new450, on 13 April 2012 - 12:58 PM, said:
Good to know! I didn't realize is was a single ring piston. No thanks.
BTW-The standard 13.5 piston still worked fine in my bike when I sold it - probably had 40-ish hours on it and judging by the quality, I would guess it would have been fine for 100 hours like the stocker.
When they say "single ring" they mean compression rings. The stock piston is a single ring too.
For what its worth, in a standard automotive style configuration, the second "compression" ring isnt really a compression ring. Its an oil scraper. Total Seal and other gapless style rings go in the second spot to basically catch what the first ring missed and scrape the remnants from the cylinder.
Smokey Yunick used to say "if you're relying on the second ring to keep compression, you should be doing something else"