LS2 piston rings.

[soonerbillz]

So my little LS2 is on the bench. The motor looks good but is down on compression.  30 LBS both dry and wet. The thing sat for God knows how long but at least it still turns over.
 Bike clock show 7900 miles on it. I'm certain it will need crank seals and that's probably some of the low compression number. I'll be pulling the top end later today.
 I'm hoping the cylinders are in spec still and may just stuck rings are the main cause.
 I see that the stock size rings are hard to find but after checking I've read that YL1 rings could be used.
 Partzilla.com shows the LS2 standard ring part # as 134-11610-02-00
 The YL1 standard as # 134-11610-00-00
 Anyone have gone through this before?

[1976RD400C]

Here is what I learned buying YL1 rings. A part number ending in 00 is square shaped rings. A number ending in 01 is keystone rings. Oversize numbers end in 10,20 for square shaped. 11, 21 would be oversizes for keystone. That doesn't really explain what 02 is but something tells me they are keystone also, check and see.

[soonerbillz]

Here is what I learned buying YL1 rings. A part number ending in 00 is square shaped rings. A number ending in 01 is keystone rings. Oversize numbers end in 10,20 for square shaped. 11, 21 would be oversizes for keystone. That doesn't really explain what 02 is but something tells me they are keystone also, check and see.

That helps quite a bit.
 Thanks.