2012 FIM Technical Rules Motocross

63.02 Oil
For oil used in two stroke mixtures, the following tolerances on the fuel
specifications will be allowed:
• Density at 15°C Plus/minus 30 kg/m³
• Distillation residue Not controlled
Any infringement of the fuel specifications will automatically result in the exclusion
of the competitor from the entire meeting (see also Sporting Code Art. 140.1). The
result of the competitors’ fuel sample analysis (A or B Sample) more favourable to
the competitor will be taken into account (See also Art. 63.05.3).
If the fuel available locally for the event is not of a sufficient quality for use by
competitors, the FMN of the organising country must ask the FIM for a waiver in
order to enable the use of fuel not corresponding to the characteristics defined
above.
63.03 Air
Only ambient air may be mixed with the fuel as an oxidant.
63.04 Primary Tests
63.04.1 In all FIM Championship and Prizes, the FIM may require tests of
fuels to be administered before, or at the time of delivery to, an event at which
such fuels are to be used.
63.04.2 FIM may request any person or organisation, being a potential
supplier of fuel, to submit a sample for testing for conformity with the fuel
specifications in Art. 63.01.
63.05 Fuel Sampling and Testing
1) The FIM-appointed Official has the sole responsibility for the
management and supervision during the taking of fuel samples.
2) The preferred fuel test method is the Gas chromatography or GC
Fingerprint method.
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General(e) Section