Quote:
Originally Posted by Jeff Higgins
As far as ring position on pistons, every motor I have ever built and subsequently rebuilt has had the ring gaps in different positions than when I built it. I religiosly space them 120 degrees apart, with no gap on the wrist pin axis or 90 degrees to it. I have yet to tear down a motor and find them still in that orientation. It's my understanding that all rings walk around the pistons, regardless of engine type, ring type, piston type, etc. So, to think you cannot re-use prefectly good pistons, cylinders, and rings because the clocking of the rings has been disturbed is simply incorrect. It gets disturbed by running the motor.
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Jeff is correct.....Space your gaps at 120 degrees and find later the rings have rotated. They do in all 4-stroke engines.....2 strokes have a "pin" to prevent this. That is so the end of the ring does pop out into the exhaust port and get broken off.
As far as CR on any large air cooled 4 stroke; be careful. Twin plug will help, but you have to really watch your timing and octane rating to aviod a problem where it will pre-ignite into self destruction......
I still have those seats I bought off you when you were in Bellingham.....Hope you found the cash I left in the hiding place on your porch........