This is where I really wish WestTexasKing would chime in & answer. But he's been MIA for a good minute now. Anyhow, you will not have any issues running AV in your bike. The only real major difference between 100LL AV & 110 Race gas (besides 10 points of detonation protection) is that the race gas usually has additives to speed up the propagation of the flame front in your combustion chamber. This may help your high rpm power. Remember that AV is designed for piston aircraft engined that redline in the area of 3200 rpm. Your 2 stroke 250 probably sees 8000 rpm a few times every ride.