Inliners International Forums General Discussion Engines What is the difference between Plain and chrome piston rings?

first there is no chrome-molly rings.
there are cast. there are molly and then there are chrome.
plain or cast rings are the base and used in most low proformance motors.
molly is used in most high proformance motors. they seat right away on the frist start up and run in. i use them all the time and have never had a problem. only the top ring is molly filled.

chrome rings where used in motors the ran without air cleaners in high dust conditions. the wore the bores rather quickly. again only the top ring was chrome plated.
for your motor i would recomend the molly rings.