From: Wayne.Orwig@AtlantaGA.NCR.COM  (Wayne Orwig)
Subject: Re: CB750 C with flames out the exhaust!!!!---->>>
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In Article <C5quw0.Btq@ux1.cso.uiuc.edu> "mikeh@ux1.cso.uiuc.edu (Mike Hollyman)" says:
> Hi, I have an 82 CB750 Custom that I just replaced the cylinder head gasket
> on.  Now when I put it back together again, it wouldn't idle at all.  It was
> only running on 2-3 cylinders and it would backfire and spit flames out the
> exhaust on the right side.  The exhaust is 4-2 MAC.  I bought new plugs
> today and it runs very rough and still won't idle.  I am quite sure the fine
> tune knobs on the carbs are messed up.  I checked the timing, it was fine, so
> I advanced it a little and that didn't help.  
> 
> I assume the carbs need to be synched.  Can I buy a kit and do this myself?
> If so, what kit is the best for the price.
> 
> Any other suggestions?
> 
> Thanks in advance.
> Mike Hollyman
> 
It sounds like you got the cam timing off..........