Jump to content
Sign in to follow this  

quick reference

Recommended Posts

im starting to rejet my ttr-250 and since they dont have a jet kit for it i have to play with different jets, right now i have a 140# mj...137# was stock, and the bottom end is great but the top end is kind of flat, i have 6 discs in my WB E series exhaust, the response is sluggish and it is running a bit on the rich side, itd be great if anyone has any ideas of what to try now,

but what i was really wanting to know is what is an easy way to tell which jet is running rich or lean,

Share this post


Link to post
Share on other sites

Use the carburetor needle clip position for low and mid-throttle changes. Use the main jet for full throttle changes. The pilot jet and pilot screw (fuel or air) is adjusted for idle mixture.

Beyond that, jetting becomes trial and error testing. Take good notes and always be thinking about the throttle position (not engine speed) when deciding which component to adjust.

James

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:

Sign in to follow this  

×