HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
fourstrokin650

XR650R FMF PowerCore 4 Squared

4 posts in this topic

I have a 2002 XR650R with the B53E needle in position #3, 175 main and stock 65S pilot with an FMF Power Core 4 Squared pipe. It does not seem to have the same bottom end power that my buddie's 2000 has. He is running the 65S pilot, 175 main, the stock needle in position #4 with an R4 White Bros pipe. Could it be the pipe? Anyone have any experience with these pipes? Any suggestions?

Share this post


Link to post
Share on other sites

I would up your pilot to the 68s. I bet it's that your throttle response is off due to being choked by the 65s.

Share this post


Link to post
Share on other sites

That's what I was thinking of trying. The only thing that is throwing me, is that my buddy is running the 65s. My 2001 had the same exact setup as well, except for a Powerbomb header and a power core IV. I was thinking about swapping exhausts with my buddy and seeingig tha makes a difference as well.

Share this post


Link to post
Share on other sites

Rode my bike today and installed the 68s. What a difference. Now it pulls off the bottom like it should. I have the new style UNI filter installed and I think that's why the 65s did not work well for me. My buddy is running the stock filter and backfire screen, so maybe that's why his works fine with the 65s. Thanks.

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