Speed wobble


Information and questions on GL1200 Goldwings (1984-1987)
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want2ride
Posts: 8
Joined: Tue Mar 24, 2015 7:35 pm
Location: Plunkett Sk. Ca. S0K 3J0
Motorcycle: 1985 1200 Aspencade

Speed wobble

Postby want2ride » Tue Jun 02, 2015 11:09 am



I just acquired an 84 1200 Aspencade. I got up to 15 klm an hour and it has a uncontrollable speed wobble. The wheel isn't bent. tire is new, forks are straight and clamps are tight, we chaulk-lined the wheels appear to be in line and I can't see any cracks in the frame. I haven't taken the front wheel off but the bearings seem to be good and the wheel turns freely. This wobble is so radical that I would think there would be something obvious but everything appears to be fine and I am not sure where to start. Does this model have a built in flaw?



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WingAdmin
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Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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Re: Speed wobble

Postby WingAdmin » Tue Jun 02, 2015 11:17 am

So many different things can cause a speed wobble, but for one to be that apparent at that low a speed, something is very wrong - and very loose. You need to go over the bike from front to back, looking for something loose. Check the steering bearings, swingarm bearings, wheel bearings. Look for any kind of wheel movement (fore/aft, side to side) that shouldn't be there.

want2ride
Posts: 8
Joined: Tue Mar 24, 2015 7:35 pm
Location: Plunkett Sk. Ca. S0K 3J0
Motorcycle: 1985 1200 Aspencade

Re: Speed wobble

Postby want2ride » Tue Jun 02, 2015 11:39 am

I guess I'll just have start taking it apart until something shows up. It should be obvious to have just a radical wobble at such a low speed. We had it up on a bike jack and wiggled and pride but couldn't find anything loose. I'll just have to dig deeper. Thx for your reply

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oldishwinger
Posts: 171
Joined: Sun Jul 14, 2013 11:26 pm
Location: New Zealand
Motorcycle: 1986 GL1200 Aspencade

Re: Speed wobble

Postby oldishwinger » Tue Jun 02, 2015 7:16 pm

the usual culprit, is tires, particularly the rear, check that both tires are bedded properly, that pressures are correct, (check manufacturers site) and there are no bulges in sides. put the bike on the center stand, and turn the wheels in the drive direction, looking for any unevenness in the tire sides. check for side to side play in wheels, the steering should go side to side with no notchyness. the next will be swingarm bearing wear.

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Wilecoyote
Posts: 18
Joined: Wed Apr 30, 2014 8:46 am
Location: Broken Arrow, Oklahoma
Motorcycle: 1985 gl1200 aspencade

Re: Speed wobble

Postby Wilecoyote » Tue Jun 02, 2015 7:36 pm

Mine was a front tire and forks had leaked almost all the fluid out. Replaced tire and rebuilt forks and all is good now. I figured I was grasping at straws but I knew they both were needed regardless and to my surprise cured the wobble.

want2ride
Posts: 8
Joined: Tue Mar 24, 2015 7:35 pm
Location: Plunkett Sk. Ca. S0K 3J0
Motorcycle: 1985 1200 Aspencade

Re: Speed wobble

Postby want2ride » Tue Jun 02, 2015 7:38 pm

I appreciate the tips and I will start with the easy simple stuff and work my way up. Like the old saying "kiss" keep it simple stupid LOL.

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Wilecoyote
Posts: 18
Joined: Wed Apr 30, 2014 8:46 am
Location: Broken Arrow, Oklahoma
Motorcycle: 1985 gl1200 aspencade

Re: Speed wobble

Postby Wilecoyote » Tue Jun 02, 2015 7:48 pm

My forks and the tire was not the "obvious " problem in my mind as far as the wobble is concerned. I just knew they needed attention and it was a way to eliminate these as a KISS problem. I guess my advise would be take care of anything the looks suspect and you know it needs first.




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