jet kit.. do need it

I just put a K&n and I am gonna purchase a E series slip on.....

Question is , do I need to put a jet kit ....??

You should rejet with those mods,,but I think the e-series has tuneable disk that are supposed to help with tuning it..I'm sure some WB owners will chime in.

[Extremeracer167]

I think alot of the time, with a K&N Filter and jsut a slip on, going with a 158 main is a safe bet. Depending on temperature, as long as u arent in antarctica or something like that, u would be safe. Maybe upening up the air screw a half turn. Thats all i did with mine when i had it. I went from WB to FMF and didnt have to touch a thing between the 2. Hope it helps a bit

[redrider ex]

out of the pipe then rejet:D

[cdalejef]

Ya, we have the best luck with 155 and 158 main jets with the setup that you are running. We use the 155 if your running the disks and the 158 if you are running it open.