A buddy of mine will soon be looking to buy a used XP. There are several in our group including mine so we are familiar with the sleds. What I am wondering is when checking compression is it better to do it cold or when the engine has been run for a while. I am planning on checking the compression on our other sleds with one gauge to compare and will use the same gauge when checking the one for sale. I realize that elevation can change the reading but hopefully the elevations should be close or within a 1000 feet when checking all sleds. Also how would you feel if someone asked to take the TRA off and checking out the internals if you had a sled for sale assuming that he brought a puller,clutch holding tool, forks for the buttons, and torque wrench or possibly even take the y-pipe off to take a look at the pistons. I know it is buyer beware but I am hoping to help my buddy get a clean used sled not an abused, worn out money pit. Thanks guys