[Rob Roy]

I have a 2000 Foreman 450. My son was driving it recently and it just died. It was smoking pretty badly prior to it quitting so I installed a set of new rings. I have checked and the spark plug is firing. I opened the air box and turned the engine over and gas was blowing out into the air box. Could this be a burnt valve?

 

[Saber6]

Check your timing I think its off 180 degrees.