I wouldnt just throw a set of rings in it without measuring the pistons and cylinders.paul23 said:I just did two cold compression checks on my sled with 2 gauges. One says 95 and 93, while the other gauge gets 112 and 110 for a 99mxz 600. So I guess I need to change my rings. Where and what brand should I look for? Any ideas on a price?