great jobby Peeateforone so what all did you replace?Just got back from a good loop in the desert for Joe's YZ rebuild break in. After 5 heat cycles with a heavy oil mix we mixed a 32:1 race gas batch. 1.2 hours on the meeter of slow ride 1/4 to 1/2 throttle and cool sessions she was ready to rip. I also put a 9oz FWW on it and the boy loves the reaction it made to the 2T. He was flying for the next 1.5 hours. Rings are seated nicely and I am damn happy, my first rebuild was a success.