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Honda TRX250ex
03-05-2006, 05:06 PM
Would i need to run race fuel with the 425cc/432cc/452cc Big Bore Kits for a 350x from FST?
Honda TRX250ex
03-06-2006, 04:47 AM
bump
Ripitupfilms
03-06-2006, 04:52 AM
definetly yes.. if you have the money to buy that kind of a modified engine prepare to have the money for gas
Honda TRX250ex
03-06-2006, 06:39 AM
Would i need to run race fuel with a 393 big bore kit?

What is the highest i can go w/o running race fuel?
chapmanmd
03-06-2006, 07:01 AM
depending on where you are altitude wise, but the general rule is 11.5:1 will allow half race gas, half pump, 12:1 or higher use race gas.

I know that there are people who can run 12:1 without race gas, but thats the general rule.
bradley300
03-06-2006, 07:45 AM
no, unless the compression/cam combo calls for it. tell FST you want to use pump gas, and he will keep the compression low. race gas would be a good idea tho, to help cool that thing down