Topic: 76k miss in cylinder 1

[amalcarb]

I have a 76k with only 6600 miles on it. It recently started an occasional miss on cylinder 1. I've cleaned the points, replaced plugs,cleaned the entire fuel system including the tank and cleaned the carbs. I also replaced the #1 rubber boot between the carb and manifold. Still have the occasional miss on the one cylinder about every 20 to 30 revs. Backfires through the pipe not the carb. Help!

[750goes]

sticky valve ?? or valve adjustment needed ?? colour of plug could be running a trifle rich..

[amalcarb]

Thanks for your response. The plug shows it's a little lean. Exhaust or intake valve?

[222CT]

i say check em both....and then since you are there check em all.

[736cc]

   Coil wires a usual suspect...run the bike in the dark and look for sparks bouncing around plug.

[joeb]

I had a miss in my engine it was a valve adjustment.

[Terry in Australia]

How old are your plug caps mate? I had a miss in #4 on my K0 (old NGK caps) so yesterday I found an old OEM cap and replaced it, and it is much better, but tomorrow I'll go buy four new ones and I reckon it'll be gone completely! Cheers, Terry.