GL1000 weaving, wobbling, wallowing


Information and questions on GL1000 Goldwings (1975-1979)
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kndw
Posts: 104
Joined: Sat Jun 19, 2010 2:56 am
Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Plempbak

GL1000 weaving, wobbling, wallowing

Post by kndw » Sun Oct 14, 2018 3:39 am



Dear all,

I've done some searching on this topic, but haven't found a satisfying answer, so here goes:

I have '76 GL1000 that has never been very stable. If i hit a bump at speeds above 140kph, i can often feel the frame to start 'warping' or something along those lines. I have tinkered with the suspension (new Wilbers peogressive springs up front, fresh fork oil (tried all weights), new hagon shocks at the back), and although the ride has improved a bit, it still isn't a bike that I dare to ride in a sporty way.

With winter coming, I now installed my rickman fairing and vetter cases. This has transformed the bike. For the worse! Now if I hit a bump at speeds above 100kph I feel the warping, and at speeds above 120kph it is like riding a string of spaghetti. I have checked things I find obvious, such as play in the wheels, forks, swingarm, cracks in the frame, but haven't found anything. Could it be that this setup is just too much for a wing? are there people who have a fully dressed wing that is actually pleasant to ride, or does anyone have any suggestions on what could be wrong?



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tfdeputydawg
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Re: GL1000 weaving, wobbling, wallowing

Post by tfdeputydawg » Sun Oct 14, 2018 6:06 am

Steering head bearings would be an excellent thing to check and replace if needed

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dingdong
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Re: GL1000 weaving, wobbling, wallowing

Post by dingdong » Sun Oct 14, 2018 7:56 am

What tires are you running? What's your tire pressure. I have had tires that did not handle well at all at speed those speeds.
Tom

John F. Kennedy would be impeached by todays liberal Democratic socialist party.

kndw
Posts: 104
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Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Plempbak

Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Sun Oct 14, 2018 10:19 am

Thanks for the replies.

I can check the steering bearings of course. However, I've fitted conical ones when the previous ones wore out, and I think I know what worn steering head bearing feel like.

The tires are Avon Roadriders, which I keep at 40 psi. I monitor this weekly, as it has a huge impact on the fuel consumption.

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terryt
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Re: GL1000 weaving, wobbling, wallowing

Post by terryt » Sun Oct 14, 2018 11:31 am

Have you got a fork brace fitted?

kndw
Posts: 104
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Motorcycle: 1976 GL1000 Plempbak

Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Sun Oct 14, 2018 2:42 pm

terryt wrote:
Sun Oct 14, 2018 11:31 am
Have you got a fork brace fitted?
Yes, I do: a telefix one

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terryt
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Re: GL1000 weaving, wobbling, wallowing

Post by terryt » Mon Oct 15, 2018 2:05 am

Being a 76 model this would have spoked wheels have you checked these. or the wheels may be buckled. it sounds like you have been through most things

Not sure how tight the spokes should be. but I can remember some one saying about tapping each one and listing at the sound if it a dull sound they were loose.

kndw
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Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Mon Oct 15, 2018 5:12 am

I'll check! But does any of you have a fully dressed GL1000 that rides well? I'd like to know some benchmark-experiences: at what speeds can you safely ride, and when/how do you know to back off?

cheers!

kndw
Posts: 104
Joined: Sat Jun 19, 2010 2:56 am
Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Plempbak

Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Mon Oct 15, 2018 5:12 am

I'll check! But does any of you have a fully dressed GL1000 that rides well? I'd like to know some benchmark-experiences: at what speeds can you safely ride, and when/how do you know to back off?

cheers!

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DenverWinger
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Re: GL1000 weaving, wobbling, wallowing

Post by DenverWinger » Mon Oct 15, 2018 7:20 am

My '77 wasn't fully dressed, but it did have a Vetter fairing on front. And even riding 2-up never had any handling issues....
They say 98% of all Hardleys ever made are still on the road..... The other 2% made it home. :lol:
(I stole this from somebody on another GW site...) :roll:

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grand rouge
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Re: GL1000 weaving, wobbling, wallowing

Post by grand rouge » Mon Oct 15, 2018 1:33 pm

I purchased a 1979 GL 1000 new. Complete Vetter Set Up. Solo or with a passenger, machine was stable even at speeds in excess of 140 KPH.


If I were to suggest one thing.....it would be to check and probably adjust the Steering Head Bearings. If too tight....wobble and weave big time....on nearly any motorcycle.

kndw
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Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Mon Oct 15, 2018 2:34 pm

grand rouge wrote:
Mon Oct 15, 2018 1:33 pm
I purchased a 1979 GL 1000 new. Complete Vetter Set Up. Solo or with a passenger, machine was stable even at speeds in excess of 140 KPH.


If I were to suggest one thing.....it would be to check and probably adjust the Steering Head Bearings. If too tight....wobble and weave big time....on nearly any motorcycle.
That could be -how do you know if they are too tight? I feel/see no play if I brake, and steering isn't difficult. Is there a torque spec or something?

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grand rouge
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Re: GL1000 weaving, wobbling, wallowing

Post by grand rouge » Mon Oct 15, 2018 2:52 pm

I do not have a torque spec...but....with front wheel off ground, straight ahead, a slight push or pull on the hand grip, then applying no more effort, the bar / wheel should turn all the eay to the stop on its own. No resistance. Bearings a wee bit loose safer and more stable than a wee bit too tight.

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landisr
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Re: GL1000 weaving, wobbling, wallowing

Post by landisr » Mon Oct 15, 2018 9:10 pm

I agree with others that you should double check the spokes. Also check the swing arm bushings, and the removeable frame section on the left side.

Good luck with your trouble shooting, and let us know what you find.

Ron in AZ
Beam me up, Scotty. There's no intelligent life down here.

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terryt
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Re: GL1000 weaving, wobbling, wallowing

Post by terryt » Tue Oct 16, 2018 12:20 pm

You said that you checked the tyre pressure but have you checked the tyres for bulges or out of shape buckled wheels.

Also I have noticed you posted about wobble head shake and handling problems a few years back is this the same bike?

kndw
Posts: 104
Joined: Sat Jun 19, 2010 2:56 am
Location: Driebergen, Utrecht
Motorcycle: 1976 GL1000 Plempbak

Re: GL1000 weaving, wobbling, wallowing

Post by kndw » Wed Oct 17, 2018 5:52 am

terryt wrote:
Tue Oct 16, 2018 12:20 pm
You said that you checked the tyre pressure but have you checked the tyres for bulges or out of shape buckled wheels.

Also I have noticed you posted about wobble head shake and handling problems a few years back is this the same bike?
:lol:

Yes, this is the same bike, I tend to stick to things.

The source of the handling problems (vertical waving/vibrations) back then was that the front tire wasn't mounted properly if I recall correctly. I would now recognize that particular problem. This is different.

I think these are the suggestions that have been given so far:
- steering stem bearings
- loose spokes
- (bushings) swingarm
- removable part of the frame
- bad tires/buckled wheels

I have removed the fairing and cases for now, to have easier access. I will test the above suggestions over the weekend. Thanks guys!



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