I've always been told that compression on a 2-stroke engine (any make) should be >120 psi. I've now been told that Polaris sleds may have less compression and still be fine, and that you can find the specs in the service manual. I have a 2013 PRO RMK 800, but cannot locate a service manual. What is "new" compression, and at what compression would you start to think there may be a need for a rebuild? Does anybody know the specs or where to find them for this sled?
What's normal compression?
