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

Water % (V/V) 0.3 EN 12937
Inorganic chloride mg/L 1 EN 15484
Acidity
% (m/m)
0.005 EN 15491
(as acetic acid)
(mg/L)
(40)
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 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 The FIM may request any person or organisation, being a potential
Official Supplier of fuel, to submit a sample for testing for conformity
with the fuel specifications.
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.
Gas chromatography (GC) is an analytical technique for separating compounds
based primarily on their volatility and polarity. Gas chromatography provides both
qualitative and quantitative information for individual compounds present in a sample.
The Gas chromatography is widely used for the analysis of fuels.
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