Purchased a fourtrax that was smoking. Previous owner said he sunk it in mud and water.. I took off topend and had it bored to next size. Also replaced timing chain. Clutch slipped after I got it back together. So I replaced clutch discs. This time the motor wouldn’t turn over. Like it was locked up. Took off side cover n I could turn the motor backward almost a whole turn. Then I could turn it forward to the same spot.. I removed cam and then tried. Motor turned perfect so reassembled topend. Motor seems to be fine now… just wondering if anyone has any ideas of what may have caused this… I was thinking a bent valve. But both valves are new…I’m clueless and afraid if I try to start it I may do more damage.