I picked up a Scat Trak 1300HD with a V1902 that smokes bad & has no power. The previous owner had the head gone through - new valves, springs, seats.. Compression test #1 = 390psi, 500psi w/40wt #2 = 320psi, 400psi w/40wt #3 = 290psi, 390psi w/40wt #4 = 320psi, 400psi w/40wt I talks to the guy...