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

The front edge shall be raised in a curve with a diameter of not less than 100 mm
which shall continue as far as a vertical line running through the centre point of the
circle created by the curve. Material to be used: minimum 12 mm outside diameter.
Any guide rail must be made of material with a circular section and a minimum
diameter of 10 mm. If it is equipped with anti-skid rail, the minimum profile angle is
60° and the maximum length 260 mm (see diagram M).
The edges of steering skis must be rounded with a profile of steel or another metal of
at least 5 mm (see diagram M).
82.17 Number plates
Number plates are compulsory. Article 01.55 is applicable.
82.18 Number plate colours
82.19 Fuel and Oil
Up to 250 cc green background white numbers
350 cc blue background white numbers
500 cc yellow background black numbers
1050 cc white background black numbers
1300 cc red background white numbers
Article 01.63 is applicable. Anti-freeze liquid is permitted.
82.20 Equipment and protective clothing
Article 01.65 is applicable.
82.21 Bibs
Article 01.76 is applicable.
82.22 Control/Verification
Article 01.77 is applicable.
82.23 Sound control
Article 01.79 is applicable.
The maximum sound: see Art.01.79.
During a snowmobile sound test, the machine must be placed on a bridge 1m off the
ground, with a microphone placed at an angle of 90° at a distance of 100 cm from the
exhaust pipe. All power train must be released from the engine. Hood and cowling
must be installed.
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