So im rebuilding my yz85 right now and i was wondering how to tell if it was a weicso piston in it? i know its not the stocker because it doesnt say the size with the A or anything and on the top of this one the last number is an A so does this mean i should go ahead and get an A sized im guessing STD sized piston? also i noticed its missing the dowl pins so im going to go ahead and get those from bike bandit and i just bought some brown & sharpe digital calipers so im wondering how to use all of this thanks also what would happen from not running with dowl pins? this is my first top end rebuild