Timing Goldwing GL1000


Information and questions on GL1000 Goldwings (1975-1979)
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timkrad
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Joined: Thu Oct 14, 2021 10:31 am
Location: United States
Motorcycle: 1976 GL 1000 Goldwing

Timing Goldwing GL1000

Post by timkrad »



I purchased a 1976 Goldwing GL1000 with 80K on the clock a couple of years ago. It was in miserable shape, but long story short, I got everything fixed up including putting in the Randakk's carb kits. Got it running reasonably good, but am having trouble with the timing. I have read and understand all the info on timing a GL1000 including Randakk's split timing instructions, but here is my problem. I set both points to .016, adjust the the main base plate so my light comes on (left side points just opening) at the F 1 mark. Everything good so far, but when I try to do the same for the right side points I cannot move the sub base plate nearly far enough to get the points to open at the F 2 mark. I have the sub base plate rotated c-clockwise as far as it will go, but this still has the points opening about 20 to 30 degees early. According to the previous owner a valve job had been done on it before he bought it, could this scenario happen if the cam timing was off by 1 tooth? Any help would be muchly appreciated.


MattMcCoy
Posts: 94
Joined: Tue Aug 25, 2020 5:31 pm
Location: Fort Worth, TX, United States
Motorcycle: 1983 GL1100A Aspencade

Re: Timing Goldwing GL1000

Post by MattMcCoy »

Did you replace the belts? You could pull the covers and make sure the timing is correct. It’s my understanding that the engine will run one tooth off, but poorly.
timkrad
Posts: 2
Joined: Thu Oct 14, 2021 10:31 am
Location: United States
Motorcycle: 1976 GL 1000 Goldwing

Re: Timing Goldwing GL1000

Post by timkrad »

I have not replaced the belts or even had the covers off. Don't want to go thru the trouble now if I don't have to. Might be a winter project for when it's 20 below outside and really hard to enjoy riding.
MattMcCoy
Posts: 94
Joined: Tue Aug 25, 2020 5:31 pm
Location: Fort Worth, TX, United States
Motorcycle: 1983 GL1100A Aspencade

Re: Timing Goldwing GL1000

Post by MattMcCoy »

Those that have been around these engines for a long time often advise to replace the belts before any other work is performed. It’s really best practice since they’re interference engines and many conditions, including age and non-use, can cause catastrophic failure. That said, everything under those covers are the basis for proper timing (i.e., timing marks, idlers, belts, tension).

Here’s an interesting article on GL timing theory, but not sure if it’s helpful for you:

https://motorcycleproject.com/text/GL10 ... _tech.html
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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Timing Goldwing GL1000

Post by dingdong »

timkrad wrote: Thu Oct 14, 2021 11:48 am I purchased a 1976 Goldwing GL1000 with 80K on the clock a couple of years ago. It was in miserable shape,
At least pull the covers and take a look.
I hope in those 2 years you haven"t been running the engine. If you want to do, at minimum a 2 valve replacement, run your bike with the same "in miserable shape, belts. ??? Been there done that. Good luck!
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LAB3
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Location: Branson, Mo
Motorcycle: Naked 1983 GL1100I project bike, now semi-dressed

Re: Timing Goldwing GL1000

Post by LAB3 »

I'm with the other guys, belts are cheap and if swapping them out and checking the timing marks doesn't do the trick then you've eliminated one possible source for the problem
Telling a man his motorcycle is pretty is like telling him his **** is cute.
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Brendan65
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Joined: Wed Apr 28, 2021 2:07 pm
Location: Vernon BC Canada
Motorcycle: 1979 GL1000
2004 GL1800A

Re: Timing Goldwing GL1000

Post by Brendan65 »

I had some issues with the light until I remembered to slide a piece of cardboard between the points I wasn't setting.
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gipsy42
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1993 GL1500 SE sold at 04/2021
1978 GL1000
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Re: Timing Goldwing GL1000

Post by gipsy42 »

The belts doesn´t make any difference in the timming, even if they're one or more tooth off, for the points setup are mounted on the same cam.
Are the points new?? you may try swapping them, perhaps they're not paired and a little difference in the heigth of the raiser (insulating part rubbing the cam) may denny the proper setup.
Mario


Mario
aka Gipsy42
And still riding...
I just regrets the things I haven't done.

http://www.surfcam.com.ar
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