hotshot

davemooreracing.com

I am helping a buddy install new intake/exhaust on his Z400. I am very experienced with carb set-up and jetting of 2-strokes, but I have never owned or worked on 4-strokes. Can you read plug color the same as on a 2-stroke, and shoot for a tan color, or is testing a thumper a different ballgame? Any advice would be appreciated...

How can I tell if it is the CDI box, or the stator?

I was riding yesterday, and my quad just died, and would not start. After checking several things, I found that I had no spark. What would cause this, and how do I fix it?