I've been reading a number of y'alls (Texan) posts about losing compression, that later comes back. What in the world is going on here? When you say "lost compression", do you mean like it only has like 50 psi of compression or something. With these things having compression ratios of 12.5:1, I'd imagine that a new bike would have on the order of 185 psig or greater. I've never checked, and cam timing can affect this. However, it sounds like the compression release is hanging open if the compression comes back later. If you've got worn rings, compression will always suck, but not change. Might be easier to start if the bike doesn't cool down too much between ride sessions. If you've got poorly adjusted valves, compression will always suck, but not change. So, does anybody have a definitive answer for this gremlin? I'd like to know.