I’m hoping someone on here has a bright idea because I’m going insane trying to figure this out. So here’s the lowdown. Rebuilt the top end of a 1982 cb900c. New piston rings, gaskets, repainted and shined up real nice. Didn’t pull the valves. Replaced the tappets to spec in each valve, put it together and it won’t turn over. Shooting flames out the carbs and backfiring. Check the compression and no cylinder is even reading on my gauge (starts at 15psi). Checked ignition and cam timing and it’s all correct. Dropped oil down the cylinder and no change. At the 1,4 position the #1 lobes are pointing toward the spark plug, the marks on the sprocket are horizontal with the case, I’ve checked the manual 100 times to make sure the timing is right and it is. I’ve even gone through and made sure the valves open (they do) and that they are on the correct stroke with the valve positions (they are). I’m completely stumped. As are my father and brother in law (who actually build diesel and race engines for a living). Any bright ideas??
Thanks,
Jason
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Thanks,
Jason
Sent from my iPhone using Tapatalk