99 foreman 450 will start but won't run, pulled the plug, grounded it, it only fires when you release the starter switch, replaced the cdi, no change. Used the pull rope to start, no fire at plug at all. Most of the trouble shooting guides start with fire at the plug or no fire at the plug. They do not have any solutions for intermittent fire or when it only fires when you release the switch.....any ideas

 

if it starts it has fire, will it idle or does it stsart and die?

 

starts but it dies,