38racing wrote:. I sprayed some carb cleaner in right carb while cranking and it does do some firing. So before I pull the head I'm going to pull the right carb and replace the AntiBackfireSolenoid with a bolt.
Not sure I understand your purpose here.. you do realize only thing the solenoid does is block off the main jet (high speed circuit) from getting fuel, right? idle circuit still gonna be feeding fuel.. Of course bad solenoid *could* cause it to run on just one cylinder (it'd starve for fuel) and sure, that lean mix can lead to eventual backfire through carb as vapors build up and then get lit off... Also, excess valve clearance would be likely to cause higher compression if anything, not lower.. unless both sides actually had equal wear but a "pounded out" intake valve seat (from being loose) could serve to reduce valve clearance on the intake.. so if one side seems to be in spec while the other's worn, I'd be quite suspicious there too.. You may have several issues in that engine, and you may discover by fixing one, you get bitten by another issue that was being "hidden" by the one you just fixed... (but no fire wouldnt really be expected to cause overheat condition that would loosen valve seats, unless it was hot enough to melt the aluminum head or block, by the way, in response to an earlier question you had)
How poor are they who have not patience. What wound did ever heal, but by degrees? - Iago (Othello Act II, Scene 3)