This may be a dumb question, but here it goes. When I do a compression test on my 650 triple all 3 cylinders will test about 125 when cold with throttle WOT. When I start the sled and let it warm up and then do another compression test all 3 cylinders will show about 118 psi. They lose about 7 psi. I would have thought when warm, with expansion, the compression would go up. Is this normal?