
Stuck valve bucket?
Bought this 06 YZ250f had a snapped timing chain. Fresh rebuilt top end bike has strong compression but why did the chain snap? At first I thought maybe they over tightened the timing chain.
Recently when installing a new chain. The exhaust cam feels fine but intake doesn’t it gets stuck when bolted w cam cap.
And bike is locked when chain is on, took chain off bike isnt locked so it’s clearly an issue w the valves or cam. I’m leaning toward just replacing the head as a whole as look at the scoring.
Reason im posting on here is cause the valve shim bucket (middle intake) is stuck won’t come off w a magnet nor fingers.
Never had this happen w any bike what would be the reason it’d be stuck? I’ve tried wiggling going fast w magnet nothing. All other buckets pop off just fine btw.