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Old 12-02-2012, 10:03 PM   #41 (permalink)
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Might be...a buddy of mine used to have an old Chevy impala that would do that. Wound being the voltage regulator getting hot and shutting the car down.


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Old 12-02-2012, 11:54 PM   #42 (permalink)
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Before you go replacing stuff, try to eliminate some possible causes, You went to school for this type stuff, what do they teach you these days about diagnosis?
Dont guess, use process of elimination.
If you done have a service manual, download one from my link below.

Check your fuel vank vent, spiders like to nest there and create all kinds of problems.

When the bike wont start, are you getting spark on both cylinders, at all the plugs?
does it fire on one cylinder or neither?
If you didnt use NGK or Denso spark plugs, you need to. best plugs on the market, either of them.. they do not need to be gapped as they come pregapped.

are the plugs sooty?
when it doesnt start do you smell fuel? open a carb drain and see if you have fuel in the bowls.

Check the 3 yellow wires at the stator connector.
And by the way, replace that float valve. get a K&L kit off ebay for about $25.00, get 2 while your at it.
That bike has a fuel pump, and a fuel filter.
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Old 12-03-2012, 01:26 AM   #43 (permalink)
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Quote:
Originally Posted by Scrapdog2grand View Post
Before you go replacing stuff, try to eliminate some possible causes, You went to school for this type stuff, what do they teach you these days about diagnosis?
Dont guess, use process of elimination.
If you done have a service manual, download one from my link below.

Check your fuel vank vent, spiders like to nest there and create all kinds of problems.

When the bike wont start, are you getting spark on both cylinders, at all the plugs?
does it fire on one cylinder or neither?
If you didnt use NGK or Denso spark plugs, you need to. best plugs on the market, either of them.. they do not need to be gapped as they come pregapped.

are the plugs sooty?
when it doesnt start do you smell fuel? open a carb drain and see if you have fuel in the bowls.

Check the 3 yellow wires at the stator connector.
And by the way, replace that float valve. get a K&L kit off ebay for about $25.00, get 2 while your at it.
That bike has a fuel pump, and a fuel filter.
Yes I planned on doing some more diagnostics. Especially since the ICM is $500. I was just throwing it out there to see what you guys think. The two new plugs I replaced where very black. I looked at them when I did the compression test. The other two I am waiting on the tool to get here because I couldnt fit anything else down there. I will test the plug wires and and the coils tomorrow along with the stator. I also got a new fuel filter I will put on tomorrow. I used NGK plugs. Its not that it wont start. It runs fine until it warms up and then it bogs down running slower and slower until it dies. And then Its hard to start up again. I have to hold the throttle all the way open and then if I dont give it throttle it dies.I am ordering the K & L kit tomorrow.

Thanks for your help
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Old 12-03-2012, 10:04 AM   #44 (permalink)
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Yes I planned on doing some more diagnostics. Especially since the ICM is $500. I was just throwing it out there to see what you guys think. The two new plugs I replaced where very black. I looked at them when I did the compression test. The other two I am waiting on the tool to get here because I couldnt fit anything else down there. I will test the plug wires and and the coils tomorrow along with the stator. I also got a new fuel filter I will put on tomorrow. I used NGK plugs. Its not that it wont start. It runs fine until it warms up and then it bogs down running slower and slower until it dies. And then Its hard to start up again. I have to hold the throttle all the way open and then if I dont give it throttle it dies.I am ordering the K & L kit tomorrow.

Thanks for your help
Did it run fine before you put the new plugs in? what do the old plugs look like?
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Old 12-03-2012, 01:40 PM   #45 (permalink)
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Did it run fine before you put the new plugs in? what do the old plugs look like?
Well, it was running rich due to a clogged air filter and some flooding due to corrosion on one of the float valves but for the most part it ran fine. I think the old plugs looked ok. But the trouble didnt start until after I changed them. I was stranded without tools and one of the two plugs I changed vibrated loose and I tried to ride home on it and it felt like only one cylinder was firing. I only got half a mile before it died and wouldnt start again. I let it sit over night and tightened the new spark plugs up and changed the gas filled oil and it fired right up. I took it for a test drive without letting it warm up and it ran great for a couple miles and then it died and I couldnt get it started at all. I let it sit overnight again and I couldnt get it started without holding the throttle all the way open and it was smoking and it died as soon as I stopped reving it. So I took the carbs off and cleaned them and it fired right up and no smoke and sounded better than ever until it reaches operating temp, then it bogs down and dies.
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Old 12-03-2012, 08:55 PM   #46 (permalink)
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Originally Posted by SuperiorKolours View Post
Well, it was running rich due to a clogged air filter and some flooding due to corrosion on one of the float valves but for the most part it ran fine. I think the old plugs looked ok. But the trouble didnt start until after I changed them. I was stranded without tools and one of the two plugs I changed vibrated loose and I tried to ride home on it and it felt like only one cylinder was firing. I only got half a mile before it died and wouldnt start again. I let it sit over night and tightened the new spark plugs up and changed the gas filled oil and it fired right up. I took it for a test drive without letting it warm up and it ran great for a couple miles and then it died and I couldnt get it started at all. I let it sit overnight again and I couldnt get it started without holding the throttle all the way open and it was smoking and it died as soon as I stopped reving it. So I took the carbs off and cleaned them and it fired right up and no smoke and sounded better than ever until it reaches operating temp, then it bogs down and dies.
well check a couple of those things, like fuel tank vent. fix that floot valve, see what the plugs look like
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Old 12-03-2012, 10:23 PM   #47 (permalink)
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well check a couple of those things, like fuel tank vent. fix that floot valve, see what the plugs look like
Ok. Well I was going to pull the plug wires of and test them and one of them just snapped right off at the connector so Im just going to order new ones tomorrow and try it out.
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Old 12-03-2012, 10:41 PM   #48 (permalink)
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Ok. Well I was going to pull the plug wires of and test them and one of them just snapped right off at the connector so Im just going to order new ones tomorrow and try it out.
might be your problem
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Old 12-03-2012, 11:01 PM   #49 (permalink)
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might be your problem
You think once the bike heats up the resistance in that wire increases and causes a weak or no spark?
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Old 12-03-2012, 11:08 PM   #50 (permalink)
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