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

Air Filter Arrangements 1985 XL 600 RF/650cc big bore

2 posts in this topic

Has anybody any experience of doing this? - I have a low mileage 1985 XL 600 RF (dual carb) that I am restoring and rebuilding as a supermoto and the air box is such a pain to get back into the frame (which I have powder coated) that I thought I'd junk it and get K&N conical air filters to fit on each of the two intakes as I want to improve air-intake anyway.

I am also doing the following modifications:

- replacing the exhaust system with high flow stainless steel headers and a FMF PowerCore4 muffler

- Hotcam installed

- considering fitting a HRC 650cc cylinder for an XR 600 with an appropriate big bore kit if possible

I realise that jetting will need to be changed, but can I safely junk the air box and go to conical K&N airfilters?

Has anybody have any experience of taking a XL 600 RF out to 650cc??

Many thanks!


Share this post

Link to post
Share on other sites

Wow, I know this post is over 5 years old and am surprised nobody ever replied to it. How did all the performance enhancements you were considering work out?

I have an 83 XL600 and opened up the airbox and plan on getting a FMF Powercore 4. Just curious. /Brian

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