So I bought an 01 yz426f a little over 3 weeks ago, got it for just $1000 bucks and everything seemed fine, was told it needed a carb adjustment, would pop and snap pretty good especially on deceleration and would sometimes die when you would come to a stop if you didn't help it by giving it some gas. Other than that It ran just fine and didn't make any weird noises or anything. Anyways, was riding with a buddy today at a local beach, 2nd gear on the throttle pretty hard about to shift to 3rd and just a terrible sound and it seized up on me. Kickstarter wouldn't move at all. Awesome, took it back to my buddies place and began tearing it apart, discovered shattered chunks of the top of one of the valves after taking the cover off, took the head off to find 3 valves with the heads broken off, one of the valve heads stuck in the top of the piston. So basically, I need a new head, valves, piston & rings, cylinder wall honed out (few very small marks), and possibly connecting rod w/new bearings and such. Pretty unhappy with the whole deal. So now I have to decide whether to buy all the parts and fix it?? (I have a buddy who is gonna do most of the work) Or part out the rest of the bike and buy something else?? (run the risk of something bad happening again) What do you guys think? P.S. , I will upload pictures at some point, I'm at work right now.