2013 AMA Supercross an FIM World Championship Rulebook

a. The maximum sound limit is set at:1. For pre-race inspectionMax. 115 dB/A2. For post-race inspectionMax. 116 dB/ANOTE: For 2014 thru 2017 the Maximum sound limit will be setat:1. For pre-race inspectionMax. 112 dB/A2. For post-race inspectionMax. 113 dB/Ab. All competitors entered may be sound tested at any time.When directed by an Official, the rider must proceed directly tothe designated sound test area; failure to do so will result in apenalty.c. The normal penalty for violation of the post-race or qualifyingsound limit will be:1. Qualifying: Loss of fastest qualifying time.2. Heat races or LCQ: Loss of three positions3. Main Events: Loss of three positions in the final standings.Points and purse will be adjusted accordingly.d. A fine may be added to the listed penalties at any time.e. If, in the judgement of the Race Director, the post-race orqualifying sound limit violation was unintentional and/or causedby an accident and the violation did not enhance theperformance of the motorcycle, the penalty may be waived.1.6 Framea. The main frame must be the same as an originallyhomologated model of the same manufacturer.b. Cracked or broken frames are prohibited.c. Strengthening gussets or tubes may be added, but none maybe removed.d. All stands must be removed.e. All footrests must fold to a 45-degree angle.f. The maximum length of the footrest from the pivot point is 5inches.g. Footrests may be raised or lowered, but cannot be lower thanthe bottom frame tube.h. Accessory brackets (for radiator, coil, shock reservoir, etc.)may be changed, relocated or removed.i. Engine mount location, steering head location and angle,swingarm pivot point, and rear suspension linkage point mustbe the same as the homologated model.j. The use of offset bearing races for the purpose of altering thesteering angle is permitted.k. Subframes may be replaced with aftermarket units of steel,aluminum or titanium provided they are similar in design to theproduction part and utilize original mounting points.8