Sign in to follow this  
Followers 0
rengland

2003 YZ450F backfiring issue

2 posts in this topic

Hello,

 

I installed a new FMF powercore 4 exhaust on my 03 YZ450f and replaced the copper gasket on the stock header. For some reason it only backfires on deceleration. Any helpful responses would be greatly appreciated.  

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

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0