I'd guess that even though riders of RC'c caliberare all superb and hence quite evenly matched the only fuel tampering that would really make much of a diference would be adding water to your competitors gas. leave the anal rules to nascar. hell, most race gas is leaded anyhow, I could see a complaint if a rider was sneaking a little nitrous or a 16:1 engine running on nitromethane, but a touch of lead? my guess is that Ricks team did not even know it (or they made a bad gamble that the would not be tested)