stupid jetting question

[honda400exrider]

i have the yoshumra slip on, k&n filter, no jetting. did anybody ride something similar, then jet it? are gains much better? ?And i have the stage 2 kit waiting in the shed, i am going to remove trhe air box, but never put the kit in in so whAT SIZE JET SHOULD i put in. thanx:D

[CranMan]

The best thing for you to do is search the powertrain forum for jetting threads. There's a ton of info already out there, so you don't have to wait for replys. I'd guess no bigger than a 165 main jet for starters, and yes, it will be well worth your time. Youre probably running lean now and need to fix that before you do any damage...

[honda400exrider]

THANK YOU!!!

[9300EX]

go to FAQ there is some great info in there for jetting:D