What race fuel are you using?

https://www.pure-gas.org/

Could be useful for you. There’s others like it ccl as well.

 

It depends on what compression ratio is targeted by the engine builder. If the compression ratio will allow a lower octane fuel like MR12 then that’s definitely going to make the most power. But in my case, I was told to use a 108 octane minumum(non-oxygenated) or U4.4(106 octane and oxygenated). Anything lower than that risks damage so that’s something to keep in mind. I run VP110 for trackdays and U4.4 for race days.

I don’t think MR12 is worth the cost, but thats just like, my opinion, man.


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Yeah, the only upside is knowing that it is consistent. Might as well run U4.4 tho


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this is the question for which I’d love an answer. Would love more power than pump, even if not as much as MR12, while not being such a pain. MR12 costs as much as a new dog, smells awful, and requires the gas tank be drained when not being used. Yuck. If I could pay like $10/gallon to make a little more power and not be a pain in the ass, I’d do it.

 

I purchase REC90 fuel from my local Southern States. They have it at the pump.

https://en.wikipedia.org/wiki/REC-90

 

That's cool. I'd trust that but unfortunately I live in CA where ethanol free fuel is a unicorn. Don't care about power, the bike has more than I need. Looks like I'll be buying cans...