Hello.
This bike was sort of runing ok on the left cylender. Had nice spark at the plug as it should on both sides seemingly. By which I mean, the right side was cold to the touch on the pipe. I was pulling off the plug wire to see if it made a diffrence and it didn't fully on or fully off. But when the plug connector was about a 1/8" away from the tip of the plug, it would fire and run fine. Now it won't run at all. No Spark. I replaced the boots with new ones cause the right side was a bit faulty. Did a new spark test and nothing wants to fire unless it's about an 1/8" away from the head. The Points seem fine the coil seems fine and the wires seem fine to. So why am I getting spark jumping from the head to the plug when it's away from the head but not when touching it? Baffeling! While running it yesterday it stopped running while I was messing with the right cylender plug wire to see if it was a short in the wire. Anything I should double check? Think it's a component or a short?
Thanks for reading.
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Spark question. Is it really happening?
I have the EXACT same problem with my CB77.
I ran it for 5 minutes orso to work with the spark cap hanging 'loosely' on the plug, then it ran fine and I drove it to work.
When I got there (when the bike was warmed up) , I putted the plug on as you would normally do, and it kept running fine.
Very strange indeed.
Didn't have the time to check if the problem still occur's , because the bike is getting ready to be registered at a garage shop now.
But yes, it was the exact same thing.
What happens if you swap your plugs ?
That way you can easely check if plug is the problem (probably), I can't check it on my bike now because it's not here.
I ran it for 5 minutes orso to work with the spark cap hanging 'loosely' on the plug, then it ran fine and I drove it to work.
When I got there (when the bike was warmed up) , I putted the plug on as you would normally do, and it kept running fine.
Very strange indeed.
Didn't have the time to check if the problem still occur's , because the bike is getting ready to be registered at a garage shop now.
But yes, it was the exact same thing.
What happens if you swap your plugs ?
That way you can easely check if plug is the problem (probably), I can't check it on my bike now because it's not here.
'Of course I've already taken a very modest position on the monetary system, I do take the position that we should just end the Fed.' - Ron Paul
Nearly, Lol Funny guy.
Nope Hain't done trimmed dem yet. I'll get right on that. Both Plugs Both sides doing exactly the same thing. Even does it with the old resistor covers on them. Both plugs are dang near brand spankin NEW! NGKs and NGK boots. Hmmm. I think maybe gas dripped into the AC generator? could that make a short and do it? The Points seem to still be in control of this. Pondering. Maybe a bad condenser? NOte: the plugs spark when the 1/4 space form the head is there. It's like the voltage is going through the head and not though the wires/plugs. Direct short in the wire to a ground? But why would it back feed like that to the end of the plug? Need a serious electrical engineer huh?
Farvignugen!
Guys,
Ok, trimed the wires back 1". Needed that anyways since there was poor connection form last resistor covers. After that.... Wait for it..... Wait for it,,,,, No Spark. Sorry.
It was still jumping at the base of the plug when a 1/4 inch form the head. So I had to really put my thinking cap on. What? how could this be? Spark from an isolated peice of steal jumping spark to the head yet no spark jump from electrode when touching head. Boggles!! Only explination is bad plug? OR!! Perfectly fouled plug! Yup! Plugs were pefectly and thinly coated in carbon from a few low grade combustions from low fuel/no fuel. (Just like a bad wick on a fuel oil heater. Perfect black soot) Plus a little oil on them and fuel making them nice and wet. Perect conductor! A dremel wire wheel and a few minutes later, back to perfectly blue/white sparks. Thanks for the help. bad plugs, I had my doubts about bad plugs since the plugs were new. Two bad plugs? Not likely.
BUT,,,,,,
It was obvious right? Had you seen it?
Ok, trimed the wires back 1". Needed that anyways since there was poor connection form last resistor covers. After that.... Wait for it..... Wait for it,,,,, No Spark. Sorry.
It was still jumping at the base of the plug when a 1/4 inch form the head. So I had to really put my thinking cap on. What? how could this be? Spark from an isolated peice of steal jumping spark to the head yet no spark jump from electrode when touching head. Boggles!! Only explination is bad plug? OR!! Perfectly fouled plug! Yup! Plugs were pefectly and thinly coated in carbon from a few low grade combustions from low fuel/no fuel. (Just like a bad wick on a fuel oil heater. Perfect black soot) Plus a little oil on them and fuel making them nice and wet. Perect conductor! A dremel wire wheel and a few minutes later, back to perfectly blue/white sparks. Thanks for the help. bad plugs, I had my doubts about bad plugs since the plugs were new. Two bad plugs? Not likely.
BUT,,,,,,
Brewsky helps every time! I need a Budweiser! :) 8-)brewsky Posted: Thu Mar 17, 2011 4:38 am Post subject:
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Could be a bad spark plug.
It was obvious right? Had you seen it?
Occasionally you can get a bad plug that is new, but most of the time it is from gas or oil fouling.
I clean them with carb cleaner, a small brass wire brush and compressed air.
I had to clean mine several times before I realized I was using the wrong spec to set my float!
I clean them with carb cleaner, a small brass wire brush and compressed air.
I had to clean mine several times before I realized I was using the wrong spec to set my float!
66 dream, 78 cb750k, 02fz1, 09 wing