Well it ran good and now doesn't run at all has fuel getting to plug and plugs fireing hot blue i gave 200 for it could it lost compression and just need rebuild?
you can get a compression tester and test it, maybe your local shop will test it free/cheap for you. here is the link to the manual http://www.yfm350.com/forums/showthread.php?t=20507
it will tell you how to check to make sure the timing is correct. Let us know the results and we can go from there
Yea, check the valve that happend to my daughters warrior, take carb. out and exau/manifold out, and turn the engine w/a wrench by removing the side cover. as your turning you can see if the valve is moving or not. check w/that let me know.