What are people running for race fuel on natually aspirated bikes with high-ish compression ratios? I was looking at the VP website at both leaded and unleaded fuels. Looks like a good choice for leaded would be MR12 or C12, and unleaded would be C10. I ran some MR12 at the Harvest Event last year and it seemed to run really well but at $150/5 gallons, that's pretty pricey. Hayabusa compression ratio (stock) is 13.1:1.