Originally posted by MAICOFRED
I HEARD FROM A RELIABLE ENGINE BUILDER THAT IF YOU MODIFY THE SILENCER ON A YZF 250 YOU CAN GET 5 HP. WHAT DO YOU TAKE OUT OR MODIFY? NEED SOME INFO. THANKS
Originally posted by jimt_yz400
So, I gather that by the responses there really is no reason to hope for more performance out of the 250F since the stock exhaust performs well enough.
Originally posted by jimt_yz400
Yes, of course you won't!! I'm *really* sure if you'll ever get 5hp out of an
exhaust anyways, but I'm sure you could get a couple.