hi everyone,,,having an issue with my 2000 warrior,,bike has been running great,,, my problem is when now when it gets warmed up,,,it loses spark,,, the coil has been changed regulator, and has a pro com cdi box,,, when the bike cools off it will start and run untill it warms up,,, with both the old and the new parts,,, i start it and run it with the old parts installed,,,when it shuts off,,, change out the new parts one at a time "cold and hot" ect,,,,, cant seem to put my finger on it,,, anyone have any suggestions,,, thanks

 

check your stator

 

I was having the same problem with my 96 warrior and it turned out to be the spark plug. I was almost ready to order a stator when the mechanic at the local yamaha dealer suggested I change the spark plug. I did and now it works great.

I think the problem with mine is that it is running rich and fouling the plug. Now I just keep an extra clean one handy.