Topic: 1 hot cylinder

[Dakotarider]

So I did my winter warm up last night for the 78 cb750.  Started right up and left it on 1/3 choke and went inside for a bit.  When I could hear that it was ready to idle down I went out and found cylinder 4 exhaust was glowing while the others were fine.  Is that because the bike was on kickstand and #4 was on the high side, therefore getting less oil?
thoughts?
It cooled down when I idled it down and went for a little spin, ran great.

[ekpent]

 If just one exhaust pipe was glowing and hot and the others were not she is trying to tell you something. Could be a carb problem,valve out of adjustment or something else going on in that cylinder bank. A good easy start would be to pull the spark plug and see what color it is and maybe compare to the #1.

[Bodi]

Not likely to be oil related. Possibly the #4 choke plate is not closing so it was running leaner than the other three? Hotter generally means leaner. The exhaust valve could also be sticking or adjusted a bit open allowing the burning charge to blow out to the header during power stroke?

[Dakotarider]

Hasn't been run in a few months, so I'm gonna start at the carbs to check out any blockages. Might try an additive first to see if it clears up. 

[evinrude7]

dakota, if you're not already doing so stick a fan in front of the fins while you're letting it warm up. 

[Dakotarider]

good idea, that night I was warming it up outside, about 2 degrees F. 

[evinrude7]

good idea, that night I was warming it up outside, about 2 degrees F.

That helps keep it from overheating.

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