Jump to content
Sign in to follow this  

XR600R with Mikuni 41 Flatside

Recommended Posts

Been looking all over for an answer on this, with no luck. 2000 XR600r with an aftermarket exhaust: full pipe and FMF power core 4. Running Uni foam air filter. Have a Mikuni 41 mm flatside carb I purchased from XR's only. Driveable, but bike has been running rich since I've put the carb on. Currently installed is a 250 main and 15 pilot. Idle wise, seems ok, but on snap accel I get a light stumble, seems to be less common when the bike is warmer. At idle, when snapping open throttle to 3/4 quickly I see some black smoke. Also some surging at low speed steady throttle cruising. Recently dropped the slide needle to its lowest setting, which improved it a little, but still obviously rich. Wondering if I should go down to a #240 or #230 main instead. Seems most people are all running #250's with similar setups as mine. I am at 500 ft above sea level in Alaska.

Any experience on this would be greatly appreciated.

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

Reply with:

Sign in to follow this