I recently purchased a used 2005 YZ125. i came back from great 3 day riding trip at ocotilla wells. Any ways i decided to perform a compression check on the engine to see how good the engine was. my readings for the engine when it was cold came out to be 165 PSI give or take 1 or 2. since i dont have a owners manual can any tell me what the normal compression for a brand new engine. thanks.
