Jump to content
Sign in to follow this  

FMF factory 4.1 system jetting changes

Recommended Posts

Bike is definitely running lean .Anyone running this system and what changes to the jetting did you make?

Share this post


Link to post
Share on other sites

Peak Power similar to stock. Mainly more mid and a bit of bottom gain. Fair bit of weight saving.

Share this post


Link to post
Share on other sites

I'm up one on the main and up one on the pilot in 50 degree weather at sea level. With just the slip-on more power everywhere including peak power IMO.

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  

×