What should the compression be on a 1997 zrt 600? All stock no engine mods.

A friend of mine re-ringed his 98 ZRT 600 at 6500 miles, it was showing an even 120 across the board. Now it has 500 miles on the new rings and is around 130-132. It's all stock like you asked...Pretty fast 4 a 600!

Mine is 75psi outside cylinders and 45 psi on the center. I guess it's a little low.
I just pulled the jugs off and I'm missing the skirts off one of the pistons. The cylinders look good for that one. The center cylinder is toast. The piston threw a ring and it did a hell of a job on the cylinder and piston. Weird part is there are no chunks in the case. Anyone know how to re-sleeve a jug? Is it hard or better off buying a new jug? Would 900 jugs fit?

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I'd be interested in finding the missing parts before adding new components.

I'm going to pull the case apart to see if I can find the missing parts. I need to get a clutch puller first. I think they are somewhere at the bottom of the case. I don't think there is anyway they could have made it through the exhaust. There were some good size chunks.