SXRAY and Damon, thanks for your help with this thread. SXRAY, the used cylinder and piston assembly worked great. I re-used my best cylinder, and piston assembly and got 110 compression in both cylinders. I took the sled out yesterday for about an hour and I couldn't tell any difference then what it was before. I pre-mixed this tank and verified I am using oil as well with the new pump properly primed. Good to go for Hurley this weekend. When I get back, I plan to put new rings in to see if I can get any better compression, depending on how she does in Hurley this weekend. Once again thanks for your help.