Monday, May 26, 2008

yet another piston/ring set...



My hyper ate another ring and piston. It happened on idle this time round, so damage was minimal. Ding the crankcase and con-rod a bit, but both could be touch up with sand paper.
Idle was already acting funny the morning that I tried to start it. It was ok at home the day before, but since I always tune my idle to be super rich, I didn't suspect any issue. Thinking back, the ring was probably already cracked. If I had caught it, the piston could have been reused.
Pistons of different states of pitting.

One thing I noticed, every broken piston has the same damage between the wrist pin and ring on the piston...