Jump to content

Change jetting with high compression piston?

Recommended Posts

I just did the valves on my 05 250x, and I'm putting in a Wiseco 13.5:1 piston.  Should I expect to have to change my jetting?  Current setup: CCC airbox cut, NoToil filter with backfire screen removed, FMF muffler, and JD jet kit running 168 main, red needle on 5th clip, and 42 pilot.

Share this post


Link to post
Share on other sites

Maybe but try it like it is first, obviously altitude and temp make a difference so you'll have to take those things into consideration also.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×