Well Cotton I hope it works, I talked to the owner of the bike yesterday and he agreed to let me keep it around and put the first few hundred miles on it, so I may have an opportunity to document the temps Etc. I have another question, have you ever used cold galvanizing compound (spray can) for gasket sealer on head gaskets? I used it on shovels for a while when we couldn't get good gaskets. I had to tear one back down to put a little extra valve clearance in it and almost never got the head off. I truly believe this engine would have run without headbolts. I put a hammer handle in the front exhaust, a cheater pipe over that, and was picking the front tire off the ground and shaking it while someone else hit a 2x4 with a three lb shop hammer. It split the gasket. After cleaning that mess up, I didn't use it any more, but it may be a cure for someone with high cyl pressures.