Jump to content
Sign in to follow this  

Jetting help??

Recommended Posts

I've got a 2001 YZ426f which I recently installed new piston and rings along with new valves, guides, seals, etc. I also had a blueprint port job done to the head. Now when riding, I am fouling a plug every ride. The carb has the stock jets. My spark plug is black and sooty when I check the condition. Any suggestions on how to adjust my jetting? It seems to bog a little at 1/4 throttle. I know my Pilot jet is #42. Is it running rich and should I go down one size on the pilot jet?

Any suggestions 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