i had recently bought a 1997 yamaha warrior,the top end was making noise when i bought it so i adjusted the valves to spec.that was not the problem ,so i took the cylinder head off and i noticed i bent the exhaust valve it was probubly me who done this seeing as the bike ran before i tore it down..i had purchased new valves on ebay,also i had purchased a new cam chain,camchain guides,tensioner.when i put all of this back togather is there a certain way i have to rotate the engine so i dont bend the new valves?i have purchased a clymer manuel for the bike but i cant find anything on the engine rotation.. i have never done this big of a job before,but i am pretty handy with a wrench,and if i put my mind to it i feel like i can accomplish this...any help on this would be great!! thankyou 4 wheeler dude in Pennsylvania