TECHNICAL RULES MOTOCROSS (INCLUDING RULES FOR ... - FIM

01.83 SPECIFICATIONS FOR QUAD RACERS
83.01 Definition
Refer to Article 01.7/Classes - Group G/Quad Racers, for definition.
83.02 Type of motorcycle
There is no restriction placed on the make, construction of type of motorcycle, other
than specified below. The cylinder capacity must be min. 250 cc and max. 350 cc
(2 cylinders max.) and 500 cc (1 cylinder). The drive must be through the rear wheels
only via a solid axle.
83.03 Wheels
Wheel rim diameter max.: 12 inches.
There is no restriction for the size of the front wheel. It is forbidden to use wheels with
spokes.
Every front wheel must have a functional brake installed on axle and operated by a
handlebar mounted lever.
On the rear, the vehicle must have a brake on each wheel or a brake fixed solidly on
the rear transmission axle of the wheels, operated by a lever on the handlebar or by
a foot-operated pedal.
Wheels must be protected by good mudguards of soft, synthetic materials.
83.04 Tyres
Article 01.49 is applicable.
83.05 Overall width
The maximum overall width cannot exceed 1300 mm.
83.06 Protection
A crash bar must be placed behind the seat. The length and width of the crash bar
must end above the rear section of the chain sprocket.
A crash ‘bar’ or ‘guard’ must be fixed at the front and the rear of the vehicle. This
protective barrier must be fitted in such a way that it is in alignment with the
outside flange of the wheels.
A protective barrier (or ‘guard’) of a round profile (minimum diameter: 25 mm) must
be installed on each side of the vehicle. There shall be no prominent (sharp) parts.
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