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
weskc35k

Hey guys

7 posts in this topic

Been out of the scene for a while.

Been for two rides in 7 months because of work.

The juicy bit am sticking my USD's from either my CRF500 4stroke or CRF450X on to my BRP this weekend and then i'll know for myself and if it sux i'll swap em back.

Also mild porting,decking the head and shaving a lb from the fly.

Anyhoo i'll let ya know.

Any info appreciated.

later guys

Share this post


Link to post
Share on other sites

Man, i had the port work on my 650 and I'm not happy with the outcome. Power loss in 4th and 5th gear, fuel range drop...

Maybe I had a poor job done, but i was happier with the head in the stock form.

Share this post


Link to post
Share on other sites

My engine guy is good Strada just a mild cleanup and shaving a few thou from the head,can't go wrong.

Share this post


Link to post
Share on other sites

i read a post recently from a guy who said the heads on the R flow as about as good as they ever will stock. he was not happy with the ones he ported.

Share this post


Link to post
Share on other sites

Dunno Marty the ports on an R are OK but still a bit can be done,mild clean up will help heaps.

Share this post


Link to post
Share on other sites

One thing in matching the exhaust ports with the headers and the intake with the manifold, and another is to get portwork. With port work they modify the geometry of the head to change the flow pattern. The first one is a great thing to do (i understand that team honda used to do that in the Mighty 1X XR650R); the second is what I did and didn't like.

BTW anyone has a stock head for sale?

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