Re: 82 CB750C smoking and missing a little. Need help plz.

Posted by GreenSkullCB750C on Jul 17, 2018; 5:10pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/82-CB750C-smoking-and-missing-a-little-Need-help-plz-tp4063611p4063616.html

Ok so I pulled the #4 pipe off so I could see the valves, they didnt look wet! Possibly rule out the oil leakin through valve stem seal. I started the bike with the pipe off and let it idle, every so often a puff of grey smoke pops out, as it was getting hotter, the smoke became more and more as it got hotter, so shut it off and reinstalled the the header back on and tightened it! Apparently the exhaust pipe to the head wasn’t tight enough making it seep out. That’s correct now, no seeping from pipe now. Definitely missing when I put load on it, blipping randomly as I try to increase speed. I believe that the charging system is in function order! Gonna go and grab 2 new coils, 2 inner and 2 outer plug wires and 4 new saprk plugs! My question now is what type of plug is best for being the correct heat range? Pulled the plugs after cleaning once and 1 and 4 plugs  keep getting black soot on them! Is this a sign of the misfiring or incorrect spark plug heat range? Thanks again for the help!