#1 Cylinder problem

[Guest]

I bought this bike nearly two months ago - a 1979 GS750E. Following a suggestion from a friend, I checked both exhaust pipes and found that the left side pipe was not nearly as powerful as the right. Upon further inspection, I found that after running for 5 min or so, #1 cylinder was warm, whereas the other 3 were HOT!

What things should I check to diagnose/correct the problem? Coils, compression test, any others?

I recently cleaned the carbs, put new plugs on it, and cleaned the plug wires, and adjusted the valves. Is there something I'm missing?

[Badooka]

A good carb synch?

[Larry D]

Yep, that's what I would do first. Sync 'em up !!

[jdknicks]

Thanks, I'll try to do that tonight! Should I colortune it before I sync the carbs?

[Agemax]

is the pipe still only warm after 5 minutes of riding or just idling?
if it is 5 minutes of riding then it is not a synch problem.

[Badooka]

Colortune before and after

[jdknicks]

is the pipe still only warm after 5 minutes of riding or just idling?
if it is 5 minutes of riding then it is not a synch problem.

Just idling. I haven't ridden her yet as she needed new tires, bearings, brakes, etc...

[ozman]

i would say that cylinder in not firing, the warmth you feel is probly just heat picked up from the cylinder next to it
oz

[jdknicks]

Well, I wasn't able to do the carb sync last night. We had some friends over and, well, you know how that goes! I hope to get that taken care of on my day off (Monday). I'll keep you all posted with my results.