Jump to content
Sign in to follow this  

YZ450F 06 jetting with FMF muffler

Recommended Posts

Hi, can someone recommend to me what jetting to use? I have a YZ450F which is stock engine wise, but has a FMF Factory 4.1 slip on muffler and midpipe. Stock header.

The FMF site doesn't have listings beyond 2005 models. My elevation is sea level. Will I have to rejet at all, or will stock jets do? If you need more infomation, please ask me.

Thanks in advance

Share this post


Link to post
Share on other sites

A slip on isn't going to force you to change your jetting. Stick with what works, 45 or 48 pilot and a 168 or 170 main, then adjust your fuel screw as needed.:applause:

Share this post


Link to post
Share on other sites

if the bike is running ok leave it the 06yz had bad jetting problems from the start . so if yours isok leave it . but fmf makes a jet kit for the 06yz and it works great i fixed my friends bike do what it says and the bike will run perfect. the needle is different if you lookat it it looks the same but the clip positions are totally differt . match them up you will see the diierence in the clip locations good luck joe 913

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  

×