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jetting for yosi pipe
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Posted by: msthondadude

I'm curious what main jets you guys are running that have the full yosi exhaust.I haven't done any airbox mods yet. I'm still running stock jet and was wondering if I should jump up a size or two.

Posted by: Got nads?

I don't know the altitude here, but I live in Alberta, Canada, and I am running a 185 main jet, with the needle clip set on the bottem last groove. Seems to be running pretty good so far. I think that the stock main in my 450R was a 118. Oh yeah I am running and open air box, witha K&N air filter too.

Posted by: Got nads?

Either way you still have to increase your fuel input when you put on a more free flowing exhaust!