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2008 Manual of Motorcycle Sport - Motorcycling Australia

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h) Age group racing:<br />

i) Subject to sub-Rule ii), only<br />

competitors in the same age<br />

groups may compete against<br />

each other,<br />

ii) Competitors from different age<br />

groups in the following classes may<br />

compete with each other if there are<br />

insufficient entries for each class:<br />

• 85cc 2-stroke big wheels and<br />

150cc 4stroke single cylinder,<br />

100cc single cylinder and 125cc<br />

single cylinder,<br />

• 125cc single cylinder & 250cc 4-stroke,<br />

• Sidecars,<br />

j) An RCB may grade junior competitors<br />

according to their respective skills,<br />

k) Division 1 is a non competitive class,<br />

12.16.0.4 4-stroke non-motocross type machines<br />

80cc to 160cc are approved for competition<br />

under the following conditions:<br />

a) Use limited to natural terrain Motocross<br />

(no man-made jumps) , Enduro and<br />

Dirt track competitions only.<br />

b) Exhaust systems may be modified or<br />

changed.<br />

c) External gearing and carburetor<br />

jetting may also be altered.<br />

d) No other modifications are allowed.<br />

12.16.0.5 4-stroke 150cc motocross-type machines<br />

may compete against 85cc 2-stroke<br />

machines in Junior competition.<br />

12.16.1 Junior Trail Bikes<br />

12.16.1.1 The following machines are eligible for<br />

club and inter-club competitions:<br />

a) 7 to under 13 years 65cc class<br />

MANUFACTURER<br />

Honda<br />

Kawasaki<br />

Suzuki<br />

Yamaha<br />

MODEL(s)<br />

CRF70, XR70<br />

KLX110<br />

JR80<br />

PW80, TT-R90<br />

and similar machines approved by Board.<br />

b) 9 to under 16 years 85cc class:<br />

MANUFACTURER<br />

Honda<br />

Kawasaki<br />

Yamaha<br />

MODEL(s)<br />

XR100, CRF100<br />

KE100<br />

TT-R125<br />

and similar machines approved by Board.<br />

12.17 Junior capacity classes - ALL<br />

DISCIPLINES<br />

12.17.1 50cc Automatic Class - Div 1 Machines<br />

12.17.1.1 Eligible Machines are:<br />

MANUFACTURER MODEL(s)<br />

FMC<br />

PY50, XRX50EY<br />

Honda<br />

CRF50, QR50<br />

HM<br />

Baja Junior<br />

Husqvarna<br />

Husky Boy Junior<br />

Kawasaki<br />

KDX50<br />

Kazuma Tiger Cat 50<br />

KTM<br />

Mini Adventure, 50ADV<br />

Senior, 50SX Mini<br />

LEM<br />

LX1, CX2, LXR50, RX2-AIR<br />

Suzuki<br />

JR50<br />

TM<br />

50C1<br />

Yamaha<br />

PW50, TT-R50E<br />

and similarly specified machines as<br />

approved by the Board may be used.<br />

12.17.1.2 Machine Requirements:<br />

a) Engine capacity must not exceed 50cc,<br />

b) The gearbox for 2-stroke machines<br />

must have 1 gear,<br />

c) The gearbox for 4-stroke machines<br />

may have up to 3 gears,<br />

d) Standard gear ratios must be retained,<br />

e) The clutch must be <strong>of</strong> centrifugal type,<br />

and <strong>of</strong> OEM type,<br />

f) 10” [254mm] wheels must be fitted,<br />

g) The appearance <strong>of</strong> a machine must<br />

remain as manufactured provided<br />

that the following may be altered:<br />

i) Colour,<br />

ii) Seat,<br />

iii) Mudguards,<br />

iv) Handlebars,<br />

v) Grips,<br />

vi) Levers,<br />

vii) Cables,<br />

viii) Chains,<br />

ix) Tyre brand and tread pattern,<br />

x) Carburettor Jets,<br />

xi) Spark Plug.<br />

h) The frame <strong>of</strong> a machine may be<br />

gusseted and strengthened but not so<br />

as to alter the geometry <strong>of</strong> the frame.<br />

A certificate issued by a qualified<br />

engineer in respect <strong>of</strong> any such<br />

gusseting and strengthening must be<br />

available at machine examination,<br />

i) The restricting washer in the exhaust<br />

12 ALL DISCIPLINES<br />

<strong>2008</strong> MANUAL OF MOTORCYCLE SPORT enjoy the ride<br />

99

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