2012 FIM Technical Rules Motocross

Group B1
Vehicles with three wheels, making two tracks on the ground, consisting of a
motorcycle making one track and a Sidecar for a passenger making the other.
Group B2
Vehicles with three wheels, making two or three tracks on the ground in the
direction of forward travel, with a permanently attached Sidecar forming a
complete integral unit.
If three tracks are made, the centre-line of the two tracks made by the motorcycle
wheels must not be more than 75 mm apart. A track is determined by the
longitudinal centre-line of each of the vehicle’s wheels in the direction of forward
travel.
Category II (not applicable for Track Racing)
Group C - Special 2 wheel driven motorcycles
Group D - Special 3 wheel, 2 wheel driven motorcycles
Group E - Snowmobiles
Group F - Sprinters and Dragsters
Group G - Quad Racers
Group H --
Group I --
Category III (not applicable for Track Racing)
Group J - Electric Vehicles (see Article 01.50)
1.07 CLASSES
Groups are again separated into classes according to cylinder capacities as
detailed below. Generally, these classes must be observed for all meetings.
For specific details, refer to this article of each discipline (CMS, CTR, CEN, CCP).
4
General(e) Section