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Let's take the exhaust off both sides and see how it runs, then we can be sure. ;)
 
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After going back over all these posts several times, I am wondering if the float height setting in the carbs is off one way or another. Have you, or a P O.. had them off for cleaning?
gumbyred
 

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Discussion Starter · #44 ·
After going back over all these posts several times, I am wondering if the float height setting in the carbs is off one way or another. Have you, or a P O.. had them off for cleaning?
gumbyred
I've just taken the carbs off the bike so I'll have a look at float levels tomorrow, thanks for the heads up
 

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I've just taken the carbs off the bike so I'll have a look at float levels tomorrow, thanks for the heads up
Why would 2 carburetor side by side stop working after 30 minutes of run time? Is there more history to the bike like it has been overheated? It would not be unusual for an engine to crack both combustion chambers if it was overheated or froze for that matter. Does the exhaust steam at start up or ever?
If there was a restriction in the exhaust even with the exhaust gasket missing the exhaust still could be too restricted to run properly. The small amount of exhaust that would get through that small crack would not be near enough to lower exhaust pressures to where they need to be.
Just throwing out a couple of thoughts that might help. :unsure:
 

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Just a thought but what is the fuel inlet route? Partial blockage to one side?
 

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CDI maybe? Can that affect only 2 cylinders on this model? On a personal note, I bought a Suzuki V-twin cheap because previous owner could not figure out why it was missing on one cylinder. It was because the carbs were so far out of sync to one another, that one cylinder was doing most of the work. In other words, one cylinder was stealing all the thunder from the other cylinder.
 

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CDI maybe? Can that affect only 2 cylinders on this model? On a personal note, I bought a Suzuki V-twin cheap because previous owner could not figure out why it was missing on one cylinder. It was because the carbs were so far out of sync to one another, that one cylinder was doing most of the work. In other words, one cylinder was stealing all the thunder from the other cylinder.
CDI? It's not a chain saw. And 1000s have points ignition unless they have been converted to electronic.
 

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Let me guess, the left side is cold. Was it idling on the side stand? You probably have a float sticking open and fuel is collecting on the low side. My guess anyway.
 

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Discussion Starter · #54 ·
Let me guess, the left side is cold. Was it idling on the side stand? You probably have a float sticking open and fuel is collecting on the low side. My guess anyway.
CDI? It's not a chain saw. And 1000s have points ignition unless they have been converted to electronic.
YAY! Now we know you are working with a good engine.
Yes, carbs are next.

Goid job so far.
Thank you
David
Hi folks, this is what I have done since.

New dyna coils/electronic ignition
Fully restored carbs

So now I have strong spark, good ignition timing, full carb overhaul. The left side of the engine is still cold, just sputtering along, and the right side is still hot and firing loud. Perhaps carbs are out of sync, however, it does not get any better at higher the rpms. I'm at a loss, maybe it is valve clearance? There is a knocking noise on the left side of the engine when its idling.
 

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Hi folks, this is what I have done since.

New dyna coils/electronic ignition
Fully restored carbs

So now I have strong spark, good ignition timing, full carb overhaul. The left side of the engine is still cold, just sputtering along, and the right side is still hot and firing loud. Perhaps carbs are out of sync, however, it does not get any better at higher the rpms. I'm at a loss, maybe it is valve clearance? There is a knocking noise on the left side of the engine when its idling.
Maybe get out your stethoscope and chase the knocking noise down??????? Does the bike seem to make a lot of stem out of the exhaust?
 

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Are you sure the plug wires are on the right plugs? Both front cylinders go to the right coil, both rear to the left coil.
 

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Discussion Starter · #57 ·
Are you sure the plug wires are on the right plugs? Both front cylinders go to the right coil, both rear to the left coil.
Yes I'm sure, brand new coils and new wires. I just adjusted all my valves. They were way too tight. It didn't fix the problem though. Next thing I'm going to do is sinc carbs. Any other suggestions?
 

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Yes I'm sure, brand new coils and new wires. I just adjusted all my valves. They were way too tight. It didn't fix the problem though. Next thing I'm going to do is sinc carbs. Any other suggestions?
Unless they are an impossible amount out of synch it's not going to be the problem.
 
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