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
Xr650LMartin

How much to expect??

6 posts in this topic

Hi

I finally did it. I just ordered a hotcam and a 101mm 10.25/1 wiseco piston. With the mods already done to my bike (sig) how much more power should I expect?

Thanks

Martin

Share this post


Link to post
Share on other sites

The stock XR650L is very restricted with the stock cam and carb setup. The stock header is doesn't flow very well giving good bottom end. Stock Horsepower is very low (about 36~38rwhp uncorked) but, there is some torque in a stock bike, it all just dies very fast for a almost 40 cubic inch engine. The much higher lift cam and much longer duration of the cam will really let this bike breath if you have the carburetor and exhaust to move that flow. Going with a displacement of 375cc (about the size of a piston out of a 318 V-8) stage two cam, pumper carburetor there has been many bike with this setup that would be right around 50 rear wheel horsepower on the dyno. Nikasil is the way to go on the XR650R punch out to a 680cc engine. You can get much tighter piston to cylinder clearance.

Considering that the XR600R (almost the same engine) board to a 628 with cam 11:5 Piston and such is giving 48rwhp there is no reason to think the "L" would give less setup the way you are going. The setup you are looking into is tried and tested, You will be happy! :bonk:

It will not be even close to the same bike....hold on!!! :excuseme:

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