hey for my raptor 350 do i have to re-jet right know since i just put my hmf on? but i am goin on a trip to croom on tuesday and was wondering could i leave the stock jet in ,and will it hurt anything?
Check the HMF forums they've helped me out quite a bit you can find them at www.hmfengineering.com
as long as your lids on, you should be able to get away with it.
my stock jettin was alrite with my gytr exhaust for my 350 but i wuld check with hmf