Dies after 30 minutes of riding, one exhaust hot the other cold!!


Information and questions on GL1000 Goldwings (1975-1979)
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bobo416
Posts: 1
Joined: Fri Sep 18, 2020 3:31 pm
Location: Canada
Motorcycle: 1978 GL1000

Dies after 30 minutes of riding, one exhaust hot the other cold!!

Post by bobo416 »



Hi folks,

I've been having an issue with a 1978 GL1000. After about 30 minutes of riding, the idle will get choppy and the bike will die. It will fire back up again after it has cooled down. I originally thought it was an ignition issue, but now I am inclined to think it is a carb problem. I recently noticed one side of of the exhaust is cold, and the plugs on that side are wet and fouled, however, there is spark. The other side gets hot and the spark plugs are in good condition. Here are the things I have checked or replaced.

Stator
Battery
Regulator
Rectifier
Condenser
Ballast
Ignition Coils
Plugs
Plug Caps

So why does my bike die once it is warmed up? Is it related to the fact that it seems only one side of the engine is firing? It seems like there is unburnt gas on the side that doesn't get hot. Is it a timing issue? Something caught in the carbs?

Thanks for your time


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Maz
Posts: 796
Joined: Tue May 19, 2015 4:43 am
Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: Dies after 30 minutes of riding, one exhaust hot the other cold!!

Post by Maz »

Possibly the carbs on the 'dead' side are flooding. Too much fuel won't ignite. Floats or float needles sticking?
Maz
Ironically, Common Sense is the LEAST common of all senses!
cfairweather
Posts: 65
Joined: Mon Jul 10, 2017 2:00 pm
Location: Cheyenne, WY
Motorcycle: 1975 GL1000, 1976 GL1000, 2013 BMW R1200RT, two restored 1971 K1 CB750s, 2019 Triumph Speed Twin
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Re: Dies after 30 minutes of riding, one exhaust hot the other cold!!

Post by cfairweather »

Take the air filter cover off and shine a flashlight into the plenum while the bike is running. Do this before and again when the problem occurs. If you see gasoline in the plenum, you have a leaky float valve, a stuck float or the fuel seals in the plenum are bad.
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