XR200R top-end rebuild

Hi Guys,

Long time reader first time poster...

A little back ground. I just picked up a 2001 XR200R. I have only rode it around the block. The bike is overall in good shape. I haven't cracked open the engine yet. I think it will be pretty good, the head looked clean when I did the valves. Compression is 150-165 dry. I have yet to wet test it. Valves are adjusted correctly and quiet. Cam chain rattle is pretty bad and I can't get the noise to adjust out. Smokes a little when hot letting off the throttle. Removed the plug to check the timing and took a shower in blow-by oil spray. Found a little aluminum in the screen. Maybe from chain rubbing? (I hope so!!!) Spark plug is carbon fouled.

So here is the definite plan:

New cam chain, guides and tensioner

Bore the cylinder

New piston and rings (possible 10.5:1)

Valve seals

Maybe some valve work if it needs it.

I understand this is not a rocketship, but I would like to make some WISE enine performance improvements. I am not willing to change the stock exhaust yet. I will put an aftermarket air filter on it, rejet it, and could possibly remove the airbox. Above all, I want reliable, durable pump gas motor.

With that in mind:

Thoughts on a "performance" cam? No I won't change valve springs.

What about piston options?

I am not looking for a miracle, maybe nothing fits my wishes. Just looking for some intelligent upgrades. I read the XR200R modification guide. Looking for more specific suggestions. Sorry for the length, just trying to answer questions before asked!

Thank you for the help.

Edited by Goattman
Title

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