Left side of motor running cold


Information and questions on GL1000 Goldwings (1975-1979)
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PuroRock
Posts: 3
Joined: Sun Sep 03, 2017 11:28 pm
Location: Kapuskasing On Canada
Motorcycle: 78 Goldwing GL 1000 Trike

Left side of motor running cold

Post by PuroRock »



Hello

I have a 78 GL1000 Trike. I've been having a problem with the left side motor. It always runs cold compare of the right side. It can idle for awhile and the left side still cold. I have change spark plugs with no results.

Tks in advance
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Maz
Posts: 785
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: Left side of motor running cold

Post by Maz »

PuroRock wrote: Sun Sep 03, 2017 11:37 pm Hello

I have a 78 GL1000 Trike. I've been having a problem with the left side motor. It always runs cold compare of the right side. It can idle for awhile and the left side still cold. I have change spark plugs with no results.

Tks in advance
If the left side is stone cold, then cylinders 2 and 4 are not firing. You have changed the plugs, but you don't say whether you checked them for spark. Lay them on the engine and crank it over. Are they sparking? If so, then you likely have a fuel blockage in the carbs on that side. More than likely plugged jets in the carbs. I would be surprised if the plugs are not sparking, as they fire from 2 different coils (front 2 cylinders on 1 coil and rear 2 on the other), so if it was a coil fault, the other 2 cylinders would not be firing either.
My money is on a carb jet blockage.
Maz
Ironically, Common Sense is the LEAST common of all senses!
PuroRock
Posts: 3
Joined: Sun Sep 03, 2017 11:28 pm
Location: Kapuskasing On Canada
Motorcycle: 78 Goldwing GL 1000 Trike

Re: Left side of motor running cold

Post by PuroRock »

Hi Maz

The carbs were clean like 2 weeks ago. The plugs were also change and theirs sparks on both plugs. I even change the 4 carbs unit to 1 carb unit and still cold on the left side.
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Maz
Posts: 785
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: Left side of motor running cold

Post by Maz »

I would be inclined to check compressions next. If you have sparks and fuel, you just need decent compression for it to ignite. The ignition timing must be OK if cylinders 1 and 3 are running OK.
Maz
Ironically, Common Sense is the LEAST common of all senses!
PuroRock
Posts: 3
Joined: Sun Sep 03, 2017 11:28 pm
Location: Kapuskasing On Canada
Motorcycle: 78 Goldwing GL 1000 Trike

Re: Left side of motor running cold

Post by PuroRock »

This is my next step. Is to check the compression. Will let you know the numbers when I do the test.


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