Racing Fuel

[heparsons]

I have recently purchased a used 2001 CR250. It has been running on Belray synthetic oil and 91 octane fuel at 1:40 ratio. Would I need to change anything to run racing fuel, and what type of mixture should run?

 

[biglou]

The short answer is yes, you will have to rejet to optimize the performance with race gas or you're wasting your money.

Do a quick search with "race gas" or "race fuel" as your keywords and you'll be reading for days.