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Ok, compression on both cylinders was 85 and 80. Not good enough.
Put a little oil in the cylinders and compression shot up to 110 on both. So rings are gone. Weird thing is, I pulled the jugs off and it looks like it's had a recent top end job done.
Sure enough, the compression rings were on upside down and in the wrong order.
Pistons are brand new (020) and everything looks clean, there are still fresh hatch markings on the cylinder walls, but I'm going to order new rings and deglaze the cylinders. I have a friend who does a lot of work on old shovels, pans, and knucks and he's not really seen this stamp on a piston?
i believe its a china cheap copy from life line the bottom of the barrel
mid usa are imports as well and i have installed hundreds of sets just buy the hastings moly ring package
V twin pistons are imports as well and have used hundreds of those as well with the hastings ring pack But the rings that come with those rings only as a set is cast not moly
KB pistons are junk like the one you have - some people have had luck with KB pistons but i have not for what its worth - the cast pistons we install i set at .003 the KB stuff is .0008 to .0012 no good with the gas we have today
i believe its a china cheap copy from life line the bottom of the barrel
mid usa are imports as well and i have installed hundreds of sets just buy the hastings moly ring package
V twin pistons are imports as well and have used hundreds of those as well with the hastings ring pack But the rings that come with those rings only as a set is cast not moly
KB pistons are junk like the one you have - some people have had luck with KB pistons but i have not for what its worth - the cast pistons we install i set at .003 the KB stuff is .0008 to .0012 no good with the gas we have today
I ordered and received a set of Hastings rings I was hoping someone could clear up a questions about the compression rings.
The second ring has the usual dot marked on the top of the ring so I know what side is up. The 1st compression ring doesn't seem to have any markers at all. I would assume that this one can go in either way? Hoping someone has used these rings before and can let me know.
Also, I've seen a lot of different thoughts of staggering the ring gaps and I was hoping some folks would offer up what they think is the best way?
Originally Posted by johnjzjz
i believe its a china cheap copy from life line the bottom of the barrel
mid usa are imports as well and i have installed hundreds of sets just buy the hastings moly ring package
V twin pistons are imports as well and have used hundreds of those as well with the hastings ring pack But the rings that come with those rings only as a set is cast not moly
KB pistons are junk like the one you have - some people have had luck with KB pistons but i have not for what its worth - the cast pistons we install i set at .003 the KB stuff is .0008 to .0012 no good with the gas we have today
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Piston rings
