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drifting piston ring?

1551 Views 14 Replies 9 Participants Last post by  jbranson, 
M
What can cause a piston ring to drift off the key? A friend of mine has an old kawi 350 triple, and he's running suzuki pistons, with the barrels bored out to match. Not sure what size the pistons are. His bike developed a "ticking" nose last night with only 80 something miles on the new top end. We found the the right piston had drifted off the key. We put it all back together again making sure everything was were it should be. When we kicked it over the nose was gone. But as soon as we started the bike it came back right away. Any thoughts???
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peteN
assuming you mean the piston ring is rotating in the groove? maybe the locating pin does not stick out far enough to keep the gap where it should be. if you replaced the rings only without replacing the pistons, and then honed the cylinders, you may wind up with enough clearance to spin a ring. if this is what you mean?

if at first you don't succeed, use a bigger hammer
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peteN
yeah, what geeto said.

if at first you don't succeed, use a bigger hammer
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