#3 Exhaust Pipe is very hot compared to others

[Anonymous]

This morning when I was warming up my bike, (1980 GS850) I noticed by touch that the 4 header pipes were giving off very different temperatures. Don't ask why I was touching my exhaust while the bike was running. All I know is that I recall reading in a forum that this was how another rider discovered a cylinder that wasn't firing.

After about 2/3 minutes of running at idle this is what I discovered:
#1: I could grab and hold on to, it was warm but not to hot
#2: Was cold
#3: Scorching hot (blister hot)
#4: Was about the same as #1

The bike seemed to idle and run fine. Upon my arrival to work which is about 6 miles all pipes seemed to just as hot as the next.

Any comments?

Curt

[daveo]

You may want to check your valve adjustments, especially for being too tight

[Anonymous]

Don't forget to look at your plugs, just in case.

[WifeofDink]

Check the wiring to the coil for cylinder 2 and 3 possibly a loose wire or the coil is about to die