I had my bike apart and decided to run a compression test. It feels slightly down on power compared to my buddies bike, otherwise all is good. If I believe the prior owner, I have about 5k miles on the bike. It is a 2002 XR650. When I ran the test it read zero with the decompression lever in and 30-40 psi without - well below the 160 they say it should have. There are a couple of things that I think could be contributing and want your guys advice. I did measure it with the throttle wide open and fully choked. 1. The compression tester stem is not long enough for me to get a wrench on it. I can only hand tighten it. Is this a big deal. 2. I measured it cold (had the stator out). Will this cause the large problem I am seeing? 3. When will the auto-decompression kick in. How bad would it run if I only had 30-40 psi. Normally I would tear in and check everything out, but we race baja in 4 weeks and the list of things to get done is long. I want to make sure I have a problem before diving in.