jetting for yosi pipe

[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.

[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.

[Got nads?]

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