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Message: [QUOTE="pat-kdx, post: 917159, member: 60909"] I took the exhaust pipe off my 2000 KDX 200 and looked into the cylinder and noticed signs of blow by on the piston. From that angle the cylinder walls still look good. I want to see if it is time for a rebuild or at least new rings by doing a compression test. What is the proper method to compression test a 2 Stroke? 1) Open the throttle fully 2) Use kick starter to rotate motor until the compression needle stops rising Would performing a leak down test yield better results? The bike is new to me and I am not 100% sure what engine work has been done. The previous owner told me the head was ported and he thought it may have been bored out. He was the second owner. Looking on the Kawasaki website, the spec for my engine states 136 psi. Is this the minimum for this engine or what is shipped from the factory? My tests are showing 180 psi after 7-8 kicks of the starter. [/QUOTE]