1. Home

RULES

  1. Introduction
  2. MA Structure
  3. General Competition Rules And Making Rule Changes
  4. Jurisdiction s
    1. 1.1 Definitions
    2. 1.2 Purpose of Rules
    3. 1.3 Repeal of Current Gcrs
    4. 1.4 by Laws
  5. Administration s
    1. 2.1 The Controlling Bodies
    2. 2.2 Sports Development Levy
    3. 2.3 Sports Development Account
    4. 2.4 Officials
  6. Licensing s
    1. 3.1 Licensing Requirements
    2. 3.2 Licensing General
    3. 3.3 Licensing Seniors
    4. 3.4 Licensing Juniors
    5. 3.5 Licensing Entrants
    6. 3.6 Licensing Speedway Mechanics
    7. 3.7 Licence Issuing And Renewals
    8. 3.8 Junior Coaching Program
  7. Competitions s
    1. 4.1 Venues
    2. 4.2 The Promotion And Conduct of Competitions
    3. 4.3 MA Events
    4. 4.4 Protocols
  8. Alternative Forms of Competition s
    1. 5.1 Alternative Activities
    2. 5.2 Venues Alternative Activities
    3. 5.3 Permits : Alternative Activities
    4. 5.4 Supplementary Regulations Alternative Activities
    5. 5.5 Licensing of Competitors Alternative Activities
    6. 5.6 Technical Specifications Alternative Activities
  9. Recreational Motorcycle Activity s
    1. 6.1 Purpose
    2. 6.2 Recreational Activities
    3. 6.3 Controlling Bodies Recreational Activities
    4. 6.4 Officials Recreational Activities
    5. 6.5 Venues Recreational Activities
    6. 6.6 The Promotion And Conduct of Recreational Activity
    7. 6.7 Permits Recreational Activities
    8. 6.8 Entries
    9. 6.9 Licensing of Participants
  10. Offences Protests And Appeals s
    1. 7.1 Offences
    2. 7.2 Protests
    3. 7.3 Appellate Bodies
    4. 7.4 Appeals
  11. Judicial Committee Guidelines s
    1. 8.1 MA Hearing Guidelines
  12. National Personal Accident Insurance s
    1. 12.1 Summary of Policy Coverage
    2. 12.2 Capital Benefits
    3. 12.3 Weekly Benefits
    4. 12.4 Definitions
  13. Road Racing s
    1. SECTION 13 A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 13 B: COMPETITION CLASSES
    3. SECTION 13C: COMPETITION RULES
    4. SECTION 13 D: TECHNICAL REGULATIONS
    5. SECTION 13 E: TECHNICAL REGULATIONS: SOLO CLASSES
    6. SECTION 13 F: TECHNICAL REGULATIONS: SIDECARS
    7. SECTION 13 G: TECHNICAL REGULATIONS: JUNIOR CLASSES
    8. SECTION 13 H: MINIMOTO
  14. Historic Road Racing s
    1. SECTION 14 A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 14 B: COMPETITION CLASSES
    3. SECTION 14 C: COMPETITION RULES
    4. SECTION 14 D: TECHNICAL REGULATIONS: GENERAL
    5. SECTION 14E: TECHNICAL REGULATIONS: PERIOD
  15. Motocross And Supercross s
    1. SECTION 15 A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 15 B: COMPETITION CLASSES
    3. SECTION 15 C: COMPETITION RULES
    4. SECTION 15 D: TECHNICAL REGULATIONS
  16. Classic Motocross And Dirt Track s
    1. SECTION 16 A: AUSTRALIAN CHAMPIONSHIPS
    2. Section 16 B Competition Classes
    3. SECTION 16 C: COMPETITION RULES
    4. SECTION 16 D TECHNICAL REGULATIONS
  17. Enduro And Reliability Trials s
    1. SECTION 17A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 17B: COMPETITION CLASSES
    3. SECTION 17C: COMPETITION RULES
    4. SECTION 17D: TECHNICAL REGULATIONS
    5. SECTION 17E: AUSTRALIAN FOUR-DAY ENDURO CHAMPIONSHIPS
  18. ATV s
    1. SECTION 18A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 18B: COMPETITION CLASSES
    3. SECTION 18C: COMPETITION RULES
    4. SECTION 18D: TECHNICAL REGULATIONS
  19. Speedway s
    1. SECTION 19A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 19B: AUSTRALIAN SPEEDWAY CHAMPIONSHIP
    3. SECTION 19C: AUSTRALIAN TEAM CHAMPIONSHIPS
    4. SECTION 19D: COMPETITION RULES
    5. SECTION 19E: TECHNICAL REGULATIONS
  20. Dirt Track s
    1. SECTION 20A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 20B: COMPETITION CLASSES
    3. SECTION 20C: COMPETITION RULES
    4. SECTION 20D: TECHNICAL REGULATIONS
  21. Track s
    1. SECTION 21A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 21B: COMPETITION CLASSES
    3. SECTION 21C: COMPETITION RULES
    4. SECTION 21D: TECHNICAL REGULATIONS
  22. Supermoto s
    1. SECTION 22A: AUSTRALIAN CHAMPIONSHIPS
    2. SECTION 22B: COMPETITION CLASSES
    3. Section 22c Competition Rules
    4. SECTION 22D: TECHNICAL REGULATIONS
  23. Trial s
    1. SECTION 23A: AUSTRALIAN CHAMPIONSHIP
    2. SECTION 23B: COMPETITION CLASSES
    3. SECTION 23C: COMPETITION RULES
    4. SECTION 23D: TECHNICAL REGULATIONS
    5. SECTION 23E: CLASS TECHNICAL REGULATIONS
  24. Minikhana s
    1. SECTION 24A: MINIKHANA CLASSES
    2. SECTION 24B: COMPETITION RULES
    3. SECTION 24C: TECHNICAL REGULATIONS
    4. SECTION 24D: MINIKHANA COURSES
  25. Policies s
    1. 25.1 Member Protection Policy
    2. 25.2 Anti-doping Policy
    3. 25.3 Anti Match-fixing Policy
    4. 25.4 Privacy Regulation
    5. 25.5 Occupational Health and Safety Policy
    6. 25.6 Environmental Sustainability Policy
    7. 25.7 National Team Selection Policy

Rules

SECTION 15 D: TECHNICAL REGULATIONS


15.19 SOUND EMISSIONS

Sound testing must be carried out at all permitted events however it is not mandatory to test all machines

15.19.1 Specifications

15.19.1.1 Sound emissions are set out in the tables below:
15.19.1.2 Where government regulations or planning orders exist in relation to lower sound emissions or where a venue has lower sound emission requirements as part of the hire contract, the sound emission required will prevail over GCR 15.19.1.1.

Effective 8th May 2014 2 Metre Max method

DISCIPLINE/EVENT LIMIT dB(A)
Motocross & SupercrossAustralian Championships 112 with a 2dB(A) allowance pre-race or event+1 db(A) post-race for degradation during the race
Motocross & SupercrossNon-Australian Championships 112 with a 4dB(A) allowance

[Proposed] Effective 2016 2 Metre Max Method

Motocross & Supercross
All competition
112 with 2 db(A) allowance pre-race or event.
+1 db(A) post-race for degradation during the race or event.

15.19.2 Sound control during competition

15.19.2.1 The Sound Control Officer (SCO) must arrive in sufficient time for discussions with the Clerk of the Course and other Technical Officials in order that a suitable test site and testing policy can be agreed.
15.19.2.2 Machines can be tested before, or after competing in an event, chosen by ballot, or as required by a Steward, Clerk of Course or SCO.

15.19.3 Use of sound level meters

15.19.3.1 Sound testing apparatus must:

  1. Comply with international standard IEC 651, Type 1 or Type 2.
  2. Include a compatible calibrator, which must be used immediately before testing begins and always just prior to a re-test if a disciplinary sanction may be imposed.
15.19.3.2 Sound testing apparatus must be set to:

  1. ‘Fast response’
  2. ‘A’ weighted,
  3. Select range High 80~130 dB,
  4. Activate the function MAX MIN – set on MAX,
15.19.3.3 ‘2 Metre Max’ Set up of the sound meter and the motorcycle:

  1. The sound levels will be measured with the sound meter/microphone fixed on a tripod, in the horizontal position, at the rear of the motorcycle.
  2. For the place and position of the motorcycle, ensure that there are no solid obstacles within a 10 meter radius of the microphone.
  3. The sound meter will be positioned at a distance of two metre behind the motorcycle, with an angle of 45° away from the centerline, on the exhaust side and at a height of 1.35 metre above the ground, with the sound meter level.
  4. The two metre distance is measured from the point where the centre of rear tyre touches the ground.
  5. It is preferred that the tests are conducted on soft ground, to prevent reverberation, for example, grass or fine gravel.
  6. In other than moderate wind, machines should face forward in to the wind direction.
  7. The ambient sound level must remain lower than 100 dB/A.
15.19.3.4 ‘2 Metre Max’ positioning of the motorcycle:
The reference points:

  1. For a motorcycle: the contact point of the rear wheel on the ground.
  2. For motorcycles fitted with two exhaust outputs, the measurement will be made on the side of the air intake. If a central positioned air intake is used, both sides will be tested.
  3. For Sidecars: the contact point of the side wheel on the ground.
  4. For ATV vehicles: the vertical line to the ground from the centre point of the rear axle.
  5. For ATV vehicles with exhaust outlet moved from the median axis, the measurement will be made on the offset side. To make repetitive measurements, all motorcycles can be positioned into a small frame fixed on the ground.
15.19.3.5 ‘2 Metre Max’ method:

  1. The measurement is can be made with the motorcycle on its wheels or on a stand, with a hot engine.
  2. During a sound test, machines not equipped with a gear box neutral must be placed on a stand.
  3. The SCO should stand beside the motorcycles, opposite the microphone and not screen or stand between the bike and the microphone. An assistant, placed on the left side of the motorcycle, shall disengage the clutch.
  4. The SCO shall open the throttle as fast as possible until full open throttle (instantly, within 0.3 seconds) and keep at max engine ‘rpm’ for at least one second. To end, the SCO will release the throttle quickly.
  5. If the result exceeds the limit, including ‘after fire’, the Inspector shall test the motorcycle a maximum of two more times.
  6. For motorcycles equipped with an engine rpm limiter, opening the throttle will be made – instantly, within 0.3 seconds – and kept open until at least one second has evolved and/or when there is an audible sign of over revving the engine.
  7. For motorcycles without an engine ‘rpm’ limiter, the opening of the throttle will have to be lower than two seconds and/or when there is an audible sign of over-revving the engine.
  8. If the engine tends to suffocate, close the throttle slightly and re-open the throttle.
  9. If detonations appear, the measurement must be started again.
  10. The numbers obtained from the test shall not be rounded down.
  11. For the sound level measurement, the handling of the throttle is limited only to the SCO, who shall open the throttle himself in order to minimize the influence by another operator (for that, it is helpful to have the microphone equipped with an extension cable to the sound meter).
  12. The motorcycle may be tested in gear.
  13. Exhaust system damage during the race: silencers fitted with removable end cap/adapters/inserts to reduce sound must be securely mounted. If removable end cap/adapters/inserts become separated from the silencer during practice, qualifying or race and the machine exceeds posted sound limits, the silencer will be deemed modified and a penalty will apply. Motorcycle exhaust systems sustaining damage during the race must meet post-race sound limits.
  14. Any competitor whose machine is tested post-race and found to exceed the maximum allowed post-race sound limit will be relegated three (3) finishing positions for the previous race. Post-qualifying, the riders’ best lap will be removed from the results.
  15. Machines found to be using lower RPM limits for the static sound test than what is used on track will be immediately excluded from the previous race. This may be verified by the use of a tachometer. For machines fitted with map select switches, all switch positions may be tested.
  16. Motorcycles that do not comply with sound test limits pre-race will not be permitted to enter the course.
  17. Post-race testing protocol:
    1. Immediately after each race, motorcycles selected for sound testing must proceed directly to the sound testing area.
    2. Only two (2) crew members per machine including the rider are permitted in the sound testing area at any one time.
    3. Where a competitor’s machine does not proceed directly to the sound testing area, the competitor will be subject to a three (3) position relegation.
    4. Machines selected for post-race sound testing must not be adjusted or interfered with until sound test is completed. A three (3) position relegation will apply for non-compliance.
15.19.3.6 Tests shall not take place in the rain

15.19.4 Pre-race machine testing

15.19.4.1 If a machine fails, it can be represented for re-testing.
15.19.4.2 No person may compete in any event on a machine whose noise emissions exceed the prescribed levels.
15.19.4.3 A machine which does not comply with the sound limits can be presented several times.

15.20 FUEL

15.20.1 Fuel Warning

15.20.1.1 Fuels and lubricants are highly specialised substances and participants must be aware they may contain substances that are extremely dangerous to human health if misused, inhaled or allowed to contact skin.
15.20.1.2 Some of the components of fuel and lubricants are suspected of having the potential to cause cancer in rare circumstances.
15.20.1.3 The use of petrol as a general cleaning and washing agent is a common misuse of a potentially dangerous substance.
15.20.1.4 Fuels should be used and stored with extreme care and in accordance with the manufacturer’s instructions.

15.20.2 Fuel Testing

15.20.2.1 For any event, meeting or series, the relevant controlling body may direct that no fuels other than fuels of prescribed specifications and from a prescribed source may be used.

  1. Tests to ensure that only prescribed fuels are used in an event, meeting or series may be administered at any time and place during the course of the same,
  2. The Clerk of Course, Race Director or Chief Scrutineer may direct the administration of fuel tests.
15.20.2.2 Fuel tests must comply with the following procedures:

  1. All containers for holding samples must be clean and constructed of robust non-reactive impermeable material, must be sealable, and must have provision for identification,
  2. Equipment used for the extraction of fuel from machines must be clean and constructed of fuel non-reactive material,
  3. All samples must be divided into two lots (Sample A and Sample B) of not less than 5ml each, which must be placed in separate containers,
  4. Once samples are placed in containers, the containers must immediately be sealed and identified by reference to the machine from which the sample was taken. This information must be entered on a fuel sample certificate which must certify the date, place and time of taking the sample, the identity of the machine from which the sample was taken and the identity of the rider,
  5. Both samples must remain in the control of the official who administered the test.
  6. The rider or the representative must sign the fuel sample certificate acknowledging samples have been taken and are sealed,
  7. All samples held by the official must be delivered as soon as practicable after the competition to the Relevant Controlling Body which must deliver the Sample A as soon as practicable to a laboratory approved by MA where they must be tested for content and quality in accordance with standard scientific procedures,
  8. The Relevant Controlling Body must as soon as practicable after receipt of the results notify the rider or rider’s team representative and MA,
  9. If the rider is dissatisfied with the test result of sample A, they may request sample B be tested at an MA approved laboratory in their presence.

15.20.3 Refueling

15.20.3.1 During refueling, each machine must be stationary with the engine stopped.
15.20.3.2 Refueling will be deemed to have commenced when the fuel tank has been opened and completed when the tank is closed.
15.20.3.3 Smoking is strictly prohibited in areas where refueling is permitted.
15.20.3.4 Riders are liable for exclusion from an event for failing to adhere to GCR 15.20.3.3, and are responsible for the actions of their mechanics and support team members.

15.20.4 Homologation of Fuel

15.20.4.1 Unleaded fuel produced by an oil company for sale in the Australian general transport fuel market through retail petrol pumps in at least five states does not have to be homologated. For the avoidance of doubt this means the fuel must be available for sale on demand from a roadside bowser outlet at each of at least five separate service stations in each of at least five Australian states or territories.
15.20.4.2 Organisations seeking homologation of fuel must provide MA with:

  1. Two one-litre sealed containers of the fuel for analysis,
  2. Details of the fuels characteristics,
  3. The distribution network,
  4. The price structure,
  5. A homologation fee of $2,500 in the first year and $2,000 per year thereafter.
15.20.4.3 Fuels approved under this GCR will be published at www.ma.org.au.

15.20.5 Fuel: Motocross and Supercross

15.20.5.1 Fuel for all machines must:

  1. Be unleaded, and
  2. Be no more than 100 RON, and
  3. Contain no additives other than those added at the point of manufacture except for:
    1. Lubricating oil for 2-stroke engines
    2. Upper cylinder lubricant for 4-stroke engines
  4. Be readily available in at least five states or territories and from at least five retail petrol pumps within Australia, or
  5. Be a brand of fuel homologated by MA that is compatible with the “Fuel Quality Standards Act 2000”

15.21 ENGINES

15.21.1 Reciprocating Engines:

16.14.1.1 The formula for calculation of capacities and classes:
Cubic capacity = (D2 x 3.1416 x C x N)
4
Where:D = Bore in centimetres,
C = stroke in centimetres,
N = Number of cylinders.

15.21.2 Engine Capacity Tolerances

15.21.2.1 Unless otherwise specified in the following table, the actual engine capacity of a machine competing in a capacity class may not exceed the prescribed capacity for that class by more than 2%:

CLASS

PERMITTED EXCESS

65cc & 85cc machines Nil
4 stroke mini bikes (Fast 50’s) Nil

15.22 FRAMES AND PARTS

15.22.1 General

15.22.2 Fuel Tanks

15.22.2.1 Fuel tanks may be constructed from any material that has been approved by the Australian Standards Association as a petrol or fuel container material.

15.22.3 Exhaust Systems

15.22.3.1 Exhaust systems must:

  1. Be fitted with silencers,
  2. Terminate at a point not more than 25mm beyond the rear extremity of the rear tyre tread,
  3. Be attached as closely as practicable to the machine and in a manner that does not, in the opinion of the Scrutineer, create a hazard to other competitors.

15.22.4 Centre and Side Stands

15.22.4.1 Centre and side stands must be removed for all types of competition other than:

  1. Natural Terrain Motocross at Club and Inter-club competitions,
  2. The 50cc class of all disciplines.
15.22.4.2 Centre and Side Stands which remain on machines under GCR 15.22.4.1 must be secured in the closed position.

15.22.5 Footrests

15.22.5.1 Footrests must:

  1. Be well rounded and designed so as to ensure that no dangerous edges are created due to wear.
  2. Not touch the ground at lean unless they are hinged or pivoted and controlled by a return spring.

15.22.6 Handlebars

15.22.6.1 The ends of the handlebars or twist grip sleeves must be securely plugged so as to present a flush or rounded end.
15.22.6.2 Handlebar levers must:

  1. Have ball ends with a minimum diameter of:
    1. 15mm, for levers longer than 76mm,
    2. 10mm, for levers shorter than 76mm.
  2. Measure no more than 200mm from the fulcrum to the extremity of the ball.
15.22.6.3 Throttle controls must be self-closing.
15.22.6.4 Solo handlebar hand lever protectors:

  1. Must be single mounted for Motocross and Supercross,
  2. May be double mounted on machines in club and inter-club natural terrain Motocross events.
15.22.6.5 Efficient brakes must be fitted to the front and rear wheels.
15.22.6.6 When the brake cam arm or lever is of the open or hooked type, the brake actuating rod or cable must be secured so as to prevent accidental dislodgment.
15.22.6.7 The handlebars must be equipped with a protection pad on the cross bar. Handlebars without a cross member must be equipped with a protection pad located in the middle of the handlebars, covering the handlebar clamps.

15.22.7 Kick Start Levers

15.22.7.1 Kick start levers, other than transverse, must be folding.

15.22.8 Drive chain protection

15.22.8.1 Front sprocket may be guarded so as to prevent direct access to the chain or sprockets with the fingers.

15.22.9 Tyres

15.22.9.1 Tyres must comply with the following:

  1. Metal studs, spikes, chain, rope or other non-skid attachments may not be used unless permitted by the relevant supplementary regulations.
  2. Treads on tyres must be at least 1mm deep on any part of the tyre that comes in contact with the ground.
  3. Paddle or scoop treaded tyres may not be fitted.
15.22.9.2 Valve caps must be used for all competitions.

15.22.10 Mudguards

15.22.10.1 Either a rear mudguard or a seat must be fitted which extends at least 20 degrees to the rear of a vertical line drawn through the rear wheel axle.
15.22.10.2 Mudguards must be made of a material, which is not liable to cause personal injury if deformed.

15.23 TECHNICAL REGULATIONS: SIDECARS

15.23.1 Sidecars: General

15.23.1.1 Sidecars, in addition to complying with the requirements for solos, must be as follows:

  1. The inside of the sidecar wheel must be enclosed to floor level,
  2. Rear sprockets and chains must be enclosed around the passenger’s working area,
  3. Any step must have a maximum width of 200mm from the sidecar,
  4. A minimum of two hand grips must be fitted,
  5. Front mounted exhaust systems must not protrude beyond the outermost edges of the sidecar,
  6. All outer edge sidecar chassis corners must have a minimum 25mm radius,
  7. The machine and sidecar must have front and rear wheel brakes,
  8. Sidecar wheel drive is prohibited.

15.23.2 Sidecars: Motocross

15.23.2.1 Wheel track measurement, taken between the longitudinal centres of the rear and sidecar wheels must be between 810mm and 1,200mm.
15.23.2.2 The minimum ground clearance must be 175mm unladen.
15.23.2.3 The maximum lean of the motorcycle at saddle height must be 50mm.
15.23.2.4 There must be no less than four sidecar attachment points.
15.23.2.5 The dimensions of the sidecar baseboard in plain view, taken from a line drawn no further rearwards than the lowest point of the front down-tube to the forward most point of the sidecar wheel tyre and terminating no further rearwards than a line drawn at right angles to the machine from the rearmost point of the rear tyre, must be:

  1. A minimum of 760mm long adjacent to the sidecar wheel,
  2. A minimum of 300mm width, with at least 25mm radius to all corners.
15.23.2.6 There must be no more than 50mm between baseboard and motorcycle and between baseboard and sidecar wheel. The baseboard must be arranged to prevent the passenger’s feet being trapped.
15.23.2.7 All handholds must be finished with a loop of at least 100mm.
15.23.2.8 Stirrup fitting for the passenger’s feet are not permitted.
15.23.2.9 Handholds on the sidecar:

  1. Must not project beyond a line taken with the outer edge of the sidecar mudguard or bodywork,
  2. Adjacent to the nose section of the sidecar and less than 200mm from the track surface must be at an angle of at least 45° from the horizontal.
15.23.2.10 The rear end of the rear wheel mudguard must terminate not more than 65° above a horizontal line drawn through the rear wheel axle and be valanced to baseboard level on the inside.
15.23.2.11 The sidecar mudguard must cover at least 135° of the periphery of the wheel and be valanced to baseboard level on the inside.
15.23.2.12 No machine may be fitted with scoop or paddle tyres.
15.23.2.13 A lanyard-operated ignition cut-out switch, operating on the primary circuit, must be fitted to sidecars in Junior and Senior Motocross. The lanyard can be up to one metre in length.
15.23.2.14 Left-hand and right-hand sidecars may compete against each other in Motocross.

15.24 TECHNICAL REGULATIONS: JUNIOR CLASSES

15.24.1 General

15.24.1.1 The technical regulations set out in this section are for junior classes. Everything that is not authorized and prescribed in this section is strictly prohibited.
15.24.1.2 Four-stroke non-motocross type machines 80cc to 160cc (excluding 80cc 4-stroke machines modified for Dirt Track and Track) are approved for competition under the following conditions:

  1. Use limited to natural terrain Motocross (no man made jumps);
  2. Exhaust systems may be modified or changed;
  3. External gearing and carburetor jetting may also be altered;
  4. No other modifications are allowed
15.24.1.3 Four-stroke 150cc motocross-type machines may compete against 85cc 2-stroke machines in junior competition.

15.24.2 Junior Solo: Wheel Sizes

CLASS

FRONT Inch [mm]

REAR Inch [mm]

50cc Demo Class 10″ [254] or OEM for the model 10″ [254]td>
50cc Auto/Demo Class 10″ or 12″ [254 or 305] 10″ [254]
65cc 14″ to 15″ [356 to 381] 12″ [305]
80cc 4 stroke Standard & Modified 16″ to 17″ [407 to 432] 14″ [356]
85cc 2 stroke & 150cc 4 stroke 15″ to 17″ [381 to 432] 14″ [356]
85cc 2 stroke & 150cc 4 stroke Big Wheel 19″ to 21″ [482 to 534] 16″ to 19″ [407 to 482]
100cc 18″ to 21″ [457 to 534] 16″ to 19″ [407 to 482]
125cc & over 17″ to 21″ [432 to 534] 16″ to 19″ [407 to 482]
250cc 4 stroke 17″ to 23″ [432 to 586] 16″ to 19″ [407 to 482]

15.24.3 Junior Sidecar: Wheel Sizes

15.24.3.1 The maximum wheel rim sizes for all relevant classes are:

WHEEL

SIZE Inch[mm]

Front 19″ [482mm]
Rear 16″ [407mm]
Sidecar 14″ [356mm]

15.24.4 Junior Solo: Handlebars

15.24.4.1 Solo handlebars must be securely plugged. and have no greater than the following widths: The width of handlebars must be not less than 600mm and not more than 850mm.

CAPACITY

HANDLEBAR WIDTH

50cc Automatic 630mm or OEM for the model
65cc 750mm
85cc 2 stroke / 150cc 4 stroke 800mm
Over 85cc / 150cc 4 stroke 850mm

15.24.5 Junior Trail Bikes eligible for competition

15.24.5.1 The following machines are eligible for club and inter-club competitions:

  1. 7 to under 13 years 65cc class

    MANUFACTURER

    MODEL(s)

    Honda CRF70, XR70, CRF80, XR80, CRF110F
    Kawasaki KLX110, KLX110C, KLX110L
    Suzuki JR80, DR-Z70
    Yamaha PW80, TT-R90 TT-R110

    and similar machines approved by Board

  2. 9 to under 16 years 85cc class:

    MANUFACTURER

    MODEL(s)

    Honda XR100, CRF100
    Kawasaki KE100 KLX140
    Yamaha TT-R125
    Suzuki DR-Z125/L

    and similar machines approved by Board.

15.24.6 50cc Demo Class Machines

15.24.6.1 Eligible Machines are:

MANUFACTURER

MODEL(s)

FMC PY50, XRX50EY
Honda CRF50, QR50
HM Baja Junior
Husqvarna Husky Boy Junior
Kawasaki KDX50
Kazuma Tiger Cat 50
KTM Mini Adventure, 50ADV Senior, 50SX Mini, 50SX Junior 2008, 50SX Mini 2009
LEM LX1, CX2, LXR50, RX2-AIR, RX2
Suzuki JR50
TM 50C1
Yamaha PW50, TT-R50E

and similarly specified machines as approved by the Board may be used.

15.24.6.1 Machine Requirements:

  1. Engine capacity must not exceed 50cc,
  2. The gearbox for 2-stroke machines must have one gear,
  3. The gearbox for 4-stroke machines may have up to three gears,
  4. Standard gear ratios must be retained,
  5. The clutch must be of centrifugal type, and of OEM type,
  6. Wheels as per GCR 15.24.2 must be fitted,
  7. The appearance of a machine must remain as manufactured provided that the following may be altered All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:
    1. Colour,
    2. Seat,
    3. Mudguards,
    4. Handlebars,
    5. Grips,
    6. Levers,
    7. Cables,
    8. Chains,
    9. Tyre brand and tread pattern,
    10. Carburettor jets,
    11. Spark Plug.
  8. The frame of a machine may be gusseted and strengthened but not so as to alter the geometry of the frame. A certificate issued by a qualified engineer in respect of any such gusseting and strengthening must be available at machine examination,
  9. The restricting washer in the exhaust header pipe abutting the cylinder barrel may be removed,
  10. Throttle limiting devices may be removed,
  11. A separate kill switch may be installed in place of the standard,
  12. Steel serrated foot pegs may replace standard rubber pegs,
  13. Handlebars must be securely plugged and be no wider than 630mm,
  14. Engine, Carburettor, Fuel system, Exhaust System, Electrics & Air Box must remain as per manufacturers specifications,
  15. Carburettor size must not exceed 14mm.

15.24.7 50cc Auto Class Machines

15.24.7.1 Eligible Machines are (for all Open events):

MANUFACTURER

MODEL(s)

Cobra King CX50
Gas Gas EC 50
HM CRX 10/10 Senior, Baja 10/10, X3R
Husqvarna Husky Boy SF03, CR50
Italjet Action Outlaw
KTM SXR PRO SNR, 50SX, SXR PRO JNR, 50 SX 2009
LEM RX3, RX3 2008, LX2F-USA, CR2, CR2S
Malagutti RCX10
Polini XR3
TM 50 C1
Metrakit MKX50

and similarly specified machines as approved by the Board may be used.

15.24.7.2 Machine Requirements:

  1. Engine capacity must not exceed 50cc,
  2. The gearbox must have one gear,
  3. External gearing may be altered,
  4. The clutch must be of centrifugal type, and of OEM type,
  5. 10″ rear wheels must be fitted.10″ [254mm] or 12″ [304mm] front wheels may be fitted,
  6. The appearance of a machine must remain as manufactured provided that the following may be altered All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:
    1. Colour,
    2. Seat,
    3. Mudguards,
    4. Handlebars,
    5. Grips,
    6. Levers,
    7. Cables,
    8. Chains,
    9. Tyre brand and tread pattern,
    10. Carburettor jets
  7. The frame of a machine may be gusseted and strengthened but not so as to alter the geometry of the frame. A certificate issued by a qualified engineer in respect of any such gusseting and strengthening must be available at machine examination,
  8. Throttle limiting devices may be removed,
  9. A separate kill switch may be installed in place of the standard,
  10. Steel serrated foot pegs may replace standard rubber pegs,
  11. Handlebars must be securely plugged and be no wider than 630mm or OEM for the model,
  12. Aftermarket exhaust systems and silencers are permitted.

15.24.8 80cc 4-Stroke Class

15.24.8.1 Machines in the 80cc 4-stroke classes must remain standard with the manufacturer’s specifications with the exception of All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:

  1. Exhaust system,
  2. Gearing,
  3. Carburettor jetting,
  4. Plastics, and
  5. Handlebars.

15.25 COMPETITION RULES: FAST 50S

15.25.1 Fast 50s: Protective Equipment

15.25.1.1 As per GCR 15.13 except 15.13.5 which is replaced by:
15.25.1.2 Footwear which must be:

  1. Constructed of leather, plastic or other similarly durable material; and
  2. Of a length that must at least cover the ankle, with the rider in a racing position on the machine.

15.25.2 Fast 50s: Classes of Competition

15.25.2.1 Senior Classes- 16 years of age and over:

  1. Stock 50cc,
  2. Limited 50cc,
  3. Mod 88cc,
  4. Mod 110cc,
  5. 110 Big Wheel Mid Size,
  6. Super Mod,
  7. 125cc,
  8. Open Outlaw,
  9. Women,
  10. Vets over 30 years of age,
  11. Seniors. Pro Class,
  12. Seniors. Amateur Class.
15.25.2.2 Junior Classes-. 12 to under 16 years:

  1. Stock 50cc.
  2. Limited 50cc.
  3. Mod 88cc.
  4. Mod 110cc.

15.25.3 Fast 50s: Approved Modifications

15.25.3.1 The following may be modified:

  1. Cosmetic changes, including but not limited to:
    1. Colour,
    2. Handle bars,
    3. Graphics,
    4. Foot pegs,
    5. Gear levers,
    6. Heavy duty rims,
  2. Air filters may be replaced with aftermarket products,
  3. Heavy duty springs and front and rear shock absorbers,
  4. Gearing, limited to sprockets,
  5. Exhaust pipes,
  6. Aftermarket camshaft and timing chain.
  7. Stock 50cc machines in both senior and junior classes may strengthen the frame / chassis.
  8. All machines, except those in Stock 50cc class in either senior or junior class, may use:
  9. Aftermarket frames / chassis,
    1. Aftermarket forks,
    2. Rear shocks,
    3. Heavy duty clutches,
    4. CDI units,
    5. Aftermarket close ratio gearbox.
15.25.3.2 Modifications to limited specific classes of machines as per table on following page, unless otherwise specified in the supplementary regulations:

CLASS

FRONT WHEEL (inches)

REAR WHEEL (inches)

HEAD INCL PORTING AND GRINDING

BARREL AND CARBURETTOR

INNER ROTOR

AUTO/ MAN

STD OEM CRANK CASE

Stock 50cc Snr 10 10 N std 50cc N A Y
Stock 50cc Jnr 10 10 N std 50cc N A Y
Limited 50cc to 90cc Snr 12 10 N 90cc N A Y
Limited 50cc to 90cc Jnr 12 10 N 90cc N A Y
Mod 88cc – Snr 12 10 Y 88cc Y A Y
Mod 88cc – Jnr 12 10 Y 88cc Y A Y
Mod 110cc Snr 12 12 Y 110cc Y A Y
Mod 110cc Jnr 12 12 Y 110cc Y A Y
110cc Big Wheel Mid Size 14 12 Y 110cc Y A Y
Super Mod 12 12 Y 124cc Y A Y
125cc 12 12 Y 125cc Y Either Y
Open Outlaw 14 12 Y 150cc Y Either N
Women / Vets 14 12 Y 150cc Y Either N
Seniors. Pro Class Open Open Y 125cc Y Either N
Seniors. Amateur Class Open Open Y 125cc Y Either N

15.25.4 Fast 50s: Technical Regulations

15.25.4.1 All machines must be an open cradle frame unless specified in supplementary regulations; and
15.25.4.2 All entrants and competitors declare that by entering an event, that their machine / machines are suitable for the class in which they are entered.
15.25.4.3 All entrants and competitors declare that they have satisfied themselves as to the suitability of their machine for the purpose of racing.
15.25.4.4 GCR 15.22.4 (side stands) does not apply to this discipline.
15.25.4.5 GCR 15.24.8 (80cc 4-stroke class) does not apply to this discipline.
15.25.4.6 GCR 15.11.1.3 does not apply to this discipline.
15.25.4.7 Capacity Tolerances: The actual engine capacity of a machine competing in a capacity class may not exceed the prescribed capacity.

15.25.5 Fast 50s: Starting

15.25.5.1 GCR 15.15.6.6 c) does not apply to this discipline as there can be no more than 20 competitors on the track at any time. This number may be lower than 20 depending on the track conditions.
15.25.5.2 Starting as per GCR 15.15.6, excluding GCR 15.15.6.6 c).

SECTION 15 D: TECHNICAL REGULATIONS


15.19 SOUND EMISSIONS

Sound testing must be carried out at all permitted events however it is not mandatory to test all machines

15.19.1 Specifications

15.19.1.1 Sound emissions are set out in the tables below:
15.19.1.2 Where government regulations or planning orders exist in relation to lower sound emissions or where a venue has lower sound emission requirements as part of the hire contract, the sound emission required will prevail over GCR 15.19.1.1.

Effective 8th May 2014 2 Metre Max method

DISCIPLINE/EVENT LIMIT dB(A)
Motocross & SupercrossAustralian Championships 112 with a 2dB(A) allowance pre-race or event+1 db(A) post-race for degradation during the race
Motocross & SupercrossNon-Australian Championships 112 with a 4dB(A) allowance

[Proposed] Effective 2016 2 Metre Max Method

Motocross & Supercross
All competition
112 with 2 db(A) allowance pre-race or event.
+1 db(A) post-race for degradation during the race or event.

15.19.2 Sound control during competition

15.19.2.1 The Sound Control Officer (SCO) must arrive in sufficient time for discussions with the Clerk of the Course and other Technical Officials in order that a suitable test site and testing policy can be agreed.
15.19.2.2 Machines can be tested before, or after competing in an event, chosen by ballot, or as required by a Steward, Clerk of Course or SCO.

15.19.3 Use of sound level meters

15.19.3.1 Sound testing apparatus must:

  1. Comply with international standard IEC 651, Type 1 or Type 2.
  2. Include a compatible calibrator, which must be used immediately before testing begins and always just prior to a re-test if a disciplinary sanction may be imposed.
15.19.3.2 Sound testing apparatus must be set to:

  1. ‘Fast response’
  2. ‘A’ weighted,
  3. Select range High 80~130 dB,
  4. Activate the function MAX MIN – set on MAX,
15.19.3.3 ‘2 Metre Max’ Set up of the sound meter and the motorcycle:

  1. The sound levels will be measured with the sound meter/microphone fixed on a tripod, in the horizontal position, at the rear of the motorcycle.
  2. For the place and position of the motorcycle, ensure that there are no solid obstacles within a 10 meter radius of the microphone.
  3. The sound meter will be positioned at a distance of two metre behind the motorcycle, with an angle of 45° away from the centerline, on the exhaust side and at a height of 1.35 metre above the ground, with the sound meter level.
  4. The two metre distance is measured from the point where the centre of rear tyre touches the ground.
  5. It is preferred that the tests are conducted on soft ground, to prevent reverberation, for example, grass or fine gravel.
  6. In other than moderate wind, machines should face forward in to the wind direction.
  7. The ambient sound level must remain lower than 100 dB/A.
15.19.3.4 ‘2 Metre Max’ positioning of the motorcycle:
The reference points:

  1. For a motorcycle: the contact point of the rear wheel on the ground.
  2. For motorcycles fitted with two exhaust outputs, the measurement will be made on the side of the air intake. If a central positioned air intake is used, both sides will be tested.
  3. For Sidecars: the contact point of the side wheel on the ground.
  4. For ATV vehicles: the vertical line to the ground from the centre point of the rear axle.
  5. For ATV vehicles with exhaust outlet moved from the median axis, the measurement will be made on the offset side. To make repetitive measurements, all motorcycles can be positioned into a small frame fixed on the ground.
15.19.3.5 ‘2 Metre Max’ method:

  1. The measurement is can be made with the motorcycle on its wheels or on a stand, with a hot engine.
  2. During a sound test, machines not equipped with a gear box neutral must be placed on a stand.
  3. The SCO should stand beside the motorcycles, opposite the microphone and not screen or stand between the bike and the microphone. An assistant, placed on the left side of the motorcycle, shall disengage the clutch.
  4. The SCO shall open the throttle as fast as possible until full open throttle (instantly, within 0.3 seconds) and keep at max engine ‘rpm’ for at least one second. To end, the SCO will release the throttle quickly.
  5. If the result exceeds the limit, including ‘after fire’, the Inspector shall test the motorcycle a maximum of two more times.
  6. For motorcycles equipped with an engine rpm limiter, opening the throttle will be made – instantly, within 0.3 seconds – and kept open until at least one second has evolved and/or when there is an audible sign of over revving the engine.
  7. For motorcycles without an engine ‘rpm’ limiter, the opening of the throttle will have to be lower than two seconds and/or when there is an audible sign of over-revving the engine.
  8. If the engine tends to suffocate, close the throttle slightly and re-open the throttle.
  9. If detonations appear, the measurement must be started again.
  10. The numbers obtained from the test shall not be rounded down.
  11. For the sound level measurement, the handling of the throttle is limited only to the SCO, who shall open the throttle himself in order to minimize the influence by another operator (for that, it is helpful to have the microphone equipped with an extension cable to the sound meter).
  12. The motorcycle may be tested in gear.
  13. Exhaust system damage during the race: silencers fitted with removable end cap/adapters/inserts to reduce sound must be securely mounted. If removable end cap/adapters/inserts become separated from the silencer during practice, qualifying or race and the machine exceeds posted sound limits, the silencer will be deemed modified and a penalty will apply. Motorcycle exhaust systems sustaining damage during the race must meet post-race sound limits.
  14. Any competitor whose machine is tested post-race and found to exceed the maximum allowed post-race sound limit will be relegated three (3) finishing positions for the previous race. Post-qualifying, the riders’ best lap will be removed from the results.
  15. Machines found to be using lower RPM limits for the static sound test than what is used on track will be immediately excluded from the previous race. This may be verified by the use of a tachometer. For machines fitted with map select switches, all switch positions may be tested.
  16. Motorcycles that do not comply with sound test limits pre-race will not be permitted to enter the course.
  17. Post-race testing protocol:
    1. Immediately after each race, motorcycles selected for sound testing must proceed directly to the sound testing area.
    2. Only two (2) crew members per machine including the rider are permitted in the sound testing area at any one time.
    3. Where a competitor’s machine does not proceed directly to the sound testing area, the competitor will be subject to a three (3) position relegation.
    4. Machines selected for post-race sound testing must not be adjusted or interfered with until sound test is completed. A three (3) position relegation will apply for non-compliance.
15.19.3.6 Tests shall not take place in the rain

15.19.4 Pre-race machine testing

15.19.4.1 If a machine fails, it can be represented for re-testing.
15.19.4.2 No person may compete in any event on a machine whose noise emissions exceed the prescribed levels.
15.19.4.3 A machine which does not comply with the sound limits can be presented several times.

15.20 FUEL

15.20.1 Fuel Warning

15.20.1.1 Fuels and lubricants are highly specialised substances and participants must be aware they may contain substances that are extremely dangerous to human health if misused, inhaled or allowed to contact skin.
15.20.1.2 Some of the components of fuel and lubricants are suspected of having the potential to cause cancer in rare circumstances.
15.20.1.3 The use of petrol as a general cleaning and washing agent is a common misuse of a potentially dangerous substance.
15.20.1.4 Fuels should be used and stored with extreme care and in accordance with the manufacturer’s instructions.

15.20.2 Fuel Testing

15.20.2.1 For any event, meeting or series, the relevant controlling body may direct that no fuels other than fuels of prescribed specifications and from a prescribed source may be used.

  1. Tests to ensure that only prescribed fuels are used in an event, meeting or series may be administered at any time and place during the course of the same,
  2. The Clerk of Course, Race Director or Chief Scrutineer may direct the administration of fuel tests.
15.20.2.2 Fuel tests must comply with the following procedures:

  1. All containers for holding samples must be clean and constructed of robust non-reactive impermeable material, must be sealable, and must have provision for identification,
  2. Equipment used for the extraction of fuel from machines must be clean and constructed of fuel non-reactive material,
  3. All samples must be divided into two lots (Sample A and Sample B) of not less than 5ml each, which must be placed in separate containers,
  4. Once samples are placed in containers, the containers must immediately be sealed and identified by reference to the machine from which the sample was taken. This information must be entered on a fuel sample certificate which must certify the date, place and time of taking the sample, the identity of the machine from which the sample was taken and the identity of the rider,
  5. Both samples must remain in the control of the official who administered the test.
  6. The rider or the representative must sign the fuel sample certificate acknowledging samples have been taken and are sealed,
  7. All samples held by the official must be delivered as soon as practicable after the competition to the Relevant Controlling Body which must deliver the Sample A as soon as practicable to a laboratory approved by MA where they must be tested for content and quality in accordance with standard scientific procedures,
  8. The Relevant Controlling Body must as soon as practicable after receipt of the results notify the rider or rider’s team representative and MA,
  9. If the rider is dissatisfied with the test result of sample A, they may request sample B be tested at an MA approved laboratory in their presence.

15.20.3 Refueling

15.20.3.1 During refueling, each machine must be stationary with the engine stopped.
15.20.3.2 Refueling will be deemed to have commenced when the fuel tank has been opened and completed when the tank is closed.
15.20.3.3 Smoking is strictly prohibited in areas where refueling is permitted.
15.20.3.4 Riders are liable for exclusion from an event for failing to adhere to GCR 15.20.3.3, and are responsible for the actions of their mechanics and support team members.

15.20.4 Homologation of Fuel

15.20.4.1 Unleaded fuel produced by an oil company for sale in the Australian general transport fuel market through retail petrol pumps in at least five states does not have to be homologated. For the avoidance of doubt this means the fuel must be available for sale on demand from a roadside bowser outlet at each of at least five separate service stations in each of at least five Australian states or territories.
15.20.4.2 Organisations seeking homologation of fuel must provide MA with:

  1. Two one-litre sealed containers of the fuel for analysis,
  2. Details of the fuels characteristics,
  3. The distribution network,
  4. The price structure,
  5. A homologation fee of $2,500 in the first year and $2,000 per year thereafter.
15.20.4.3 Fuels approved under this GCR will be published at www.ma.org.au.

15.20.5 Fuel: Motocross and Supercross

15.20.5.1 Fuel for all machines must:

  1. Be unleaded, and
  2. Be no more than 100 RON, and
  3. Contain no additives other than those added at the point of manufacture except for:
    1. Lubricating oil for 2-stroke engines
    2. Upper cylinder lubricant for 4-stroke engines
  4. Be readily available in at least five states or territories and from at least five retail petrol pumps within Australia, or
  5. Be a brand of fuel homologated by MA that is compatible with the “Fuel Quality Standards Act 2000”

15.21 ENGINES

15.21.1 Reciprocating Engines:

16.14.1.1 The formula for calculation of capacities and classes:
Cubic capacity = (D2 x 3.1416 x C x N)
4
Where:D = Bore in centimetres,
C = stroke in centimetres,
N = Number of cylinders.

15.21.2 Engine Capacity Tolerances

15.21.2.1 Unless otherwise specified in the following table, the actual engine capacity of a machine competing in a capacity class may not exceed the prescribed capacity for that class by more than 2%:

CLASS

PERMITTED EXCESS

65cc & 85cc machines Nil
4 stroke mini bikes (Fast 50’s) Nil

15.22 FRAMES AND PARTS

15.22.1 General

15.22.2 Fuel Tanks

15.22.2.1 Fuel tanks may be constructed from any material that has been approved by the Australian Standards Association as a petrol or fuel container material.

15.22.3 Exhaust Systems

15.22.3.1 Exhaust systems must:

  1. Be fitted with silencers,
  2. Terminate at a point not more than 25mm beyond the rear extremity of the rear tyre tread,
  3. Be attached as closely as practicable to the machine and in a manner that does not, in the opinion of the Scrutineer, create a hazard to other competitors.

15.22.4 Centre and Side Stands

15.22.4.1 Centre and side stands must be removed for all types of competition other than:

  1. Natural Terrain Motocross at Club and Inter-club competitions,
  2. The 50cc class of all disciplines.
15.22.4.2 Centre and Side Stands which remain on machines under GCR 15.22.4.1 must be secured in the closed position.

15.22.5 Footrests

15.22.5.1 Footrests must:

  1. Be well rounded and designed so as to ensure that no dangerous edges are created due to wear.
  2. Not touch the ground at lean unless they are hinged or pivoted and controlled by a return spring.

15.22.6 Handlebars

15.22.6.1 The ends of the handlebars or twist grip sleeves must be securely plugged so as to present a flush or rounded end.
15.22.6.2 Handlebar levers must:

  1. Have ball ends with a minimum diameter of:
    1. 15mm, for levers longer than 76mm,
    2. 10mm, for levers shorter than 76mm.
  2. Measure no more than 200mm from the fulcrum to the extremity of the ball.
15.22.6.3 Throttle controls must be self-closing.
15.22.6.4 Solo handlebar hand lever protectors:

  1. Must be single mounted for Motocross and Supercross,
  2. May be double mounted on machines in club and inter-club natural terrain Motocross events.
15.22.6.5 Efficient brakes must be fitted to the front and rear wheels.
15.22.6.6 When the brake cam arm or lever is of the open or hooked type, the brake actuating rod or cable must be secured so as to prevent accidental dislodgment.
15.22.6.7 The handlebars must be equipped with a protection pad on the cross bar. Handlebars without a cross member must be equipped with a protection pad located in the middle of the handlebars, covering the handlebar clamps.

15.22.7 Kick Start Levers

15.22.7.1 Kick start levers, other than transverse, must be folding.

15.22.8 Drive chain protection

15.22.8.1 Front sprocket may be guarded so as to prevent direct access to the chain or sprockets with the fingers.

15.22.9 Tyres

15.22.9.1 Tyres must comply with the following:

  1. Metal studs, spikes, chain, rope or other non-skid attachments may not be used unless permitted by the relevant supplementary regulations.
  2. Treads on tyres must be at least 1mm deep on any part of the tyre that comes in contact with the ground.
  3. Paddle or scoop treaded tyres may not be fitted.
15.22.9.2 Valve caps must be used for all competitions.

15.22.10 Mudguards

15.22.10.1 Either a rear mudguard or a seat must be fitted which extends at least 20 degrees to the rear of a vertical line drawn through the rear wheel axle.
15.22.10.2 Mudguards must be made of a material, which is not liable to cause personal injury if deformed.

15.23 TECHNICAL REGULATIONS: SIDECARS

15.23.1 Sidecars: General

15.23.1.1 Sidecars, in addition to complying with the requirements for solos, must be as follows:

  1. The inside of the sidecar wheel must be enclosed to floor level,
  2. Rear sprockets and chains must be enclosed around the passenger’s working area,
  3. Any step must have a maximum width of 200mm from the sidecar,
  4. A minimum of two hand grips must be fitted,
  5. Front mounted exhaust systems must not protrude beyond the outermost edges of the sidecar,
  6. All outer edge sidecar chassis corners must have a minimum 25mm radius,
  7. The machine and sidecar must have front and rear wheel brakes,
  8. Sidecar wheel drive is prohibited.

15.23.2 Sidecars: Motocross

15.23.2.1 Wheel track measurement, taken between the longitudinal centres of the rear and sidecar wheels must be between 810mm and 1,200mm.
15.23.2.2 The minimum ground clearance must be 175mm unladen.
15.23.2.3 The maximum lean of the motorcycle at saddle height must be 50mm.
15.23.2.4 There must be no less than four sidecar attachment points.
15.23.2.5 The dimensions of the sidecar baseboard in plain view, taken from a line drawn no further rearwards than the lowest point of the front down-tube to the forward most point of the sidecar wheel tyre and terminating no further rearwards than a line drawn at right angles to the machine from the rearmost point of the rear tyre, must be:

  1. A minimum of 760mm long adjacent to the sidecar wheel,
  2. A minimum of 300mm width, with at least 25mm radius to all corners.
15.23.2.6 There must be no more than 50mm between baseboard and motorcycle and between baseboard and sidecar wheel. The baseboard must be arranged to prevent the passenger’s feet being trapped.
15.23.2.7 All handholds must be finished with a loop of at least 100mm.
15.23.2.8 Stirrup fitting for the passenger’s feet are not permitted.
15.23.2.9 Handholds on the sidecar:

  1. Must not project beyond a line taken with the outer edge of the sidecar mudguard or bodywork,
  2. Adjacent to the nose section of the sidecar and less than 200mm from the track surface must be at an angle of at least 45° from the horizontal.
15.23.2.10 The rear end of the rear wheel mudguard must terminate not more than 65° above a horizontal line drawn through the rear wheel axle and be valanced to baseboard level on the inside.
15.23.2.11 The sidecar mudguard must cover at least 135° of the periphery of the wheel and be valanced to baseboard level on the inside.
15.23.2.12 No machine may be fitted with scoop or paddle tyres.
15.23.2.13 A lanyard-operated ignition cut-out switch, operating on the primary circuit, must be fitted to sidecars in Junior and Senior Motocross. The lanyard can be up to one metre in length.
15.23.2.14 Left-hand and right-hand sidecars may compete against each other in Motocross.

15.24 TECHNICAL REGULATIONS: JUNIOR CLASSES

15.24.1 General

15.24.1.1 The technical regulations set out in this section are for junior classes. Everything that is not authorized and prescribed in this section is strictly prohibited.
15.24.1.2 Four-stroke non-motocross type machines 80cc to 160cc (excluding 80cc 4-stroke machines modified for Dirt Track and Track) are approved for competition under the following conditions:

  1. Use limited to natural terrain Motocross (no man made jumps);
  2. Exhaust systems may be modified or changed;
  3. External gearing and carburetor jetting may also be altered;
  4. No other modifications are allowed
15.24.1.3 Four-stroke 150cc motocross-type machines may compete against 85cc 2-stroke machines in junior competition.

15.24.2 Junior Solo: Wheel Sizes

CLASS

FRONT Inch [mm]

REAR Inch [mm]

50cc Demo Class 10″ [254] or OEM for the model 10″ [254]td>
50cc Auto/Demo Class 10″ or 12″ [254 or 305] 10″ [254]
65cc 14″ to 15″ [356 to 381] 12″ [305]
80cc 4 stroke Standard & Modified 16″ to 17″ [407 to 432] 14″ [356]
85cc 2 stroke & 150cc 4 stroke 15″ to 17″ [381 to 432] 14″ [356]
85cc 2 stroke & 150cc 4 stroke Big Wheel 19″ to 21″ [482 to 534] 16″ to 19″ [407 to 482]
100cc 18″ to 21″ [457 to 534] 16″ to 19″ [407 to 482]
125cc & over 17″ to 21″ [432 to 534] 16″ to 19″ [407 to 482]
250cc 4 stroke 17″ to 23″ [432 to 586] 16″ to 19″ [407 to 482]

15.24.3 Junior Sidecar: Wheel Sizes

15.24.3.1 The maximum wheel rim sizes for all relevant classes are:

WHEEL

SIZE Inch[mm]

Front 19″ [482mm]
Rear 16″ [407mm]
Sidecar 14″ [356mm]

15.24.4 Junior Solo: Handlebars

15.24.4.1 Solo handlebars must be securely plugged. and have no greater than the following widths: The width of handlebars must be not less than 600mm and not more than 850mm.

CAPACITY

HANDLEBAR WIDTH

50cc Automatic 630mm or OEM for the model
65cc 750mm
85cc 2 stroke / 150cc 4 stroke 800mm
Over 85cc / 150cc 4 stroke 850mm

15.24.5 Junior Trail Bikes eligible for competition

15.24.5.1 The following machines are eligible for club and inter-club competitions:

  1. 7 to under 13 years 65cc class

    MANUFACTURER

    MODEL(s)

    Honda CRF70, XR70, CRF80, XR80, CRF110F
    Kawasaki KLX110, KLX110C, KLX110L
    Suzuki JR80, DR-Z70
    Yamaha PW80, TT-R90 TT-R110

    and similar machines approved by Board

  2. 9 to under 16 years 85cc class:

    MANUFACTURER

    MODEL(s)

    Honda XR100, CRF100
    Kawasaki KE100 KLX140
    Yamaha TT-R125
    Suzuki DR-Z125/L

    and similar machines approved by Board.

15.24.6 50cc Demo Class Machines

15.24.6.1 Eligible Machines are:

MANUFACTURER

MODEL(s)

FMC PY50, XRX50EY
Honda CRF50, QR50
HM Baja Junior
Husqvarna Husky Boy Junior
Kawasaki KDX50
Kazuma Tiger Cat 50
KTM Mini Adventure, 50ADV Senior, 50SX Mini, 50SX Junior 2008, 50SX Mini 2009
LEM LX1, CX2, LXR50, RX2-AIR, RX2
Suzuki JR50
TM 50C1
Yamaha PW50, TT-R50E

and similarly specified machines as approved by the Board may be used.

15.24.6.1 Machine Requirements:

  1. Engine capacity must not exceed 50cc,
  2. The gearbox for 2-stroke machines must have one gear,
  3. The gearbox for 4-stroke machines may have up to three gears,
  4. Standard gear ratios must be retained,
  5. The clutch must be of centrifugal type, and of OEM type,
  6. Wheels as per GCR 15.24.2 must be fitted,
  7. The appearance of a machine must remain as manufactured provided that the following may be altered All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:
    1. Colour,
    2. Seat,
    3. Mudguards,
    4. Handlebars,
    5. Grips,
    6. Levers,
    7. Cables,
    8. Chains,
    9. Tyre brand and tread pattern,
    10. Carburettor jets,
    11. Spark Plug.
  8. The frame of a machine may be gusseted and strengthened but not so as to alter the geometry of the frame. A certificate issued by a qualified engineer in respect of any such gusseting and strengthening must be available at machine examination,
  9. The restricting washer in the exhaust header pipe abutting the cylinder barrel may be removed,
  10. Throttle limiting devices may be removed,
  11. A separate kill switch may be installed in place of the standard,
  12. Steel serrated foot pegs may replace standard rubber pegs,
  13. Handlebars must be securely plugged and be no wider than 630mm,
  14. Engine, Carburettor, Fuel system, Exhaust System, Electrics & Air Box must remain as per manufacturers specifications,
  15. Carburettor size must not exceed 14mm.

15.24.7 50cc Auto Class Machines

15.24.7.1 Eligible Machines are (for all Open events):

MANUFACTURER

MODEL(s)

Cobra King CX50
Gas Gas EC 50
HM CRX 10/10 Senior, Baja 10/10, X3R
Husqvarna Husky Boy SF03, CR50
Italjet Action Outlaw
KTM SXR PRO SNR, 50SX, SXR PRO JNR, 50 SX 2009
LEM RX3, RX3 2008, LX2F-USA, CR2, CR2S
Malagutti RCX10
Polini XR3
TM 50 C1
Metrakit MKX50

and similarly specified machines as approved by the Board may be used.

15.24.7.2 Machine Requirements:

  1. Engine capacity must not exceed 50cc,
  2. The gearbox must have one gear,
  3. External gearing may be altered,
  4. The clutch must be of centrifugal type, and of OEM type,
  5. 10″ rear wheels must be fitted.10″ [254mm] or 12″ [304mm] front wheels may be fitted,
  6. The appearance of a machine must remain as manufactured provided that the following may be altered All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:
    1. Colour,
    2. Seat,
    3. Mudguards,
    4. Handlebars,
    5. Grips,
    6. Levers,
    7. Cables,
    8. Chains,
    9. Tyre brand and tread pattern,
    10. Carburettor jets
  7. The frame of a machine may be gusseted and strengthened but not so as to alter the geometry of the frame. A certificate issued by a qualified engineer in respect of any such gusseting and strengthening must be available at machine examination,
  8. Throttle limiting devices may be removed,
  9. A separate kill switch may be installed in place of the standard,
  10. Steel serrated foot pegs may replace standard rubber pegs,
  11. Handlebars must be securely plugged and be no wider than 630mm or OEM for the model,
  12. Aftermarket exhaust systems and silencers are permitted.

15.24.8 80cc 4-Stroke Class

15.24.8.1 Machines in the 80cc 4-stroke classes must remain standard with the manufacturer’s specifications with the exception of All machines must remain standard to the OEM specifications for the model. Only the following items may be modified:

  1. Exhaust system,
  2. Gearing,
  3. Carburettor jetting,
  4. Plastics, and
  5. Handlebars.

15.25 COMPETITION RULES: FAST 50S

15.25.1 Fast 50s: Protective Equipment

15.25.1.1 As per GCR 15.13 except 15.13.5 which is replaced by:
15.25.1.2 Footwear which must be:

  1. Constructed of leather, plastic or other similarly durable material; and
  2. Of a length that must at least cover the ankle, with the rider in a racing position on the machine.

15.25.2 Fast 50s: Classes of Competition

15.25.2.1 Senior Classes- 16 years of age and over:

  1. Stock 50cc,
  2. Limited 50cc,
  3. Mod 88cc,
  4. Mod 110cc,
  5. 110 Big Wheel Mid Size,
  6. Super Mod,
  7. 125cc,
  8. Open Outlaw,
  9. Women,
  10. Vets over 30 years of age,
  11. Seniors. Pro Class,
  12. Seniors. Amateur Class.
15.25.2.2 Junior Classes-. 12 to under 16 years:

  1. Stock 50cc.
  2. Limited 50cc.
  3. Mod 88cc.
  4. Mod 110cc.

15.25.3 Fast 50s: Approved Modifications

15.25.3.1 The following may be modified:

  1. Cosmetic changes, including but not limited to:
    1. Colour,
    2. Handle bars,
    3. Graphics,
    4. Foot pegs,
    5. Gear levers,
    6. Heavy duty rims,
  2. Air filters may be replaced with aftermarket products,
  3. Heavy duty springs and front and rear shock absorbers,
  4. Gearing, limited to sprockets,
  5. Exhaust pipes,
  6. Aftermarket camshaft and timing chain.
  7. Stock 50cc machines in both senior and junior classes may strengthen the frame / chassis.
  8. All machines, except those in Stock 50cc class in either senior or junior class, may use:
  9. Aftermarket frames / chassis,
    1. Aftermarket forks,
    2. Rear shocks,
    3. Heavy duty clutches,
    4. CDI units,
    5. Aftermarket close ratio gearbox.
15.25.3.2 Modifications to limited specific classes of machines as per table on following page, unless otherwise specified in the supplementary regulations:

CLASS

FRONT WHEEL (inches)

REAR WHEEL (inches)

HEAD INCL PORTING AND GRINDING

BARREL AND CARBURETTOR

INNER ROTOR

AUTO/ MAN

STD OEM CRANK CASE

Stock 50cc Snr 10 10 N std 50cc N A Y
Stock 50cc Jnr 10 10 N std 50cc N A Y
Limited 50cc to 90cc Snr 12 10 N 90cc N A Y
Limited 50cc to 90cc Jnr 12 10 N 90cc N A Y
Mod 88cc – Snr 12 10 Y 88cc Y A Y
Mod 88cc – Jnr 12 10 Y 88cc Y A Y
Mod 110cc Snr 12 12 Y 110cc Y A Y
Mod 110cc Jnr 12 12 Y 110cc Y A Y
110cc Big Wheel Mid Size 14 12 Y 110cc Y A Y
Super Mod 12 12 Y 124cc Y A Y
125cc 12 12 Y 125cc Y Either Y
Open Outlaw 14 12 Y 150cc Y Either N
Women / Vets 14 12 Y 150cc Y Either N
Seniors. Pro Class Open Open Y 125cc Y Either N
Seniors. Amateur Class Open Open Y 125cc Y Either N

15.25.4 Fast 50s: Technical Regulations

15.25.4.1 All machines must be an open cradle frame unless specified in supplementary regulations; and
15.25.4.2 All entrants and competitors declare that by entering an event, that their machine / machines are suitable for the class in which they are entered.
15.25.4.3 All entrants and competitors declare that they have satisfied themselves as to the suitability of their machine for the purpose of racing.
15.25.4.4 GCR 15.22.4 (side stands) does not apply to this discipline.
15.25.4.5 GCR 15.24.8 (80cc 4-stroke class) does not apply to this discipline.
15.25.4.6 GCR 15.11.1.3 does not apply to this discipline.
15.25.4.7 Capacity Tolerances: The actual engine capacity of a machine competing in a capacity class may not exceed the prescribed capacity.

15.25.5 Fast 50s: Starting

15.25.5.1 GCR 15.15.6.6 c) does not apply to this discipline as there can be no more than 20 competitors on the track at any time. This number may be lower than 20 depending on the track conditions.
15.25.5.2 Starting as per GCR 15.15.6, excluding GCR 15.15.6.6 c).