bad ride at 25


Information and questions on GL1200 Goldwings (1984-1987)
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Randy-1
Posts: 6
Joined: Sun Oct 16, 2011 12:24 pm
Location: Lynden, WA
Motorcycle: 1986 GL 1200 Aspencade

bad ride at 25

Postby Randy-1 » Sun Oct 16, 2011 12:43 pm



I have a rythmic bumping that occurs in between 25-35 mph. It is just like the front tire is out of round. I have purchased a new tire and checked the rim for out of round and nothing is wrong. Is there anyone else who is experiencing this problem with their '86 aspencade.



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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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Re: bad ride at 25

Postby virgilmobile » Mon Oct 17, 2011 8:07 am

Does it do that in a different gear?Try 2nd at 25mph then 3rd at the same speed.Maybe even 4th.
If the symptom is the same,you can at least eliminate the engine and trans.

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: bad ride at 25

Postby virgilmobile » Mon Oct 17, 2011 9:29 am

Is the bumping the front end actually bumping like rumble bars or just bouncing the front end.
My 1100 bounced,but was attributed to the shocks being bound up(bent fork and worn slides).
The front end would move with hard force(lifting or braking)but were essentially stuck while normal driving.There is a test for the shocks.It takes 2 people.It's refereed to as a 'stiction' test.Its been posted here....http://www.goldwingdocs.com/forum/viewt ... =16&t=6445

It ends up with the bike just bouncing on the tire.

Randy-1
Posts: 6
Joined: Sun Oct 16, 2011 12:24 pm
Location: Lynden, WA
Motorcycle: 1986 GL 1200 Aspencade

Re: bad ride at 25

Postby Randy-1 » Mon Oct 17, 2011 10:19 am

Hi Virgil. Thanks for the response. Yes it does it in all gears. It makes the ride actually not enjoyable at that speed.
It was my Dad's bike, he gave it to me when he could no longer ride due to cancer. Now I just want to keep it at the same pristene condition it is in. I knew there was a problem when he had it but he didn't know any better and thought that was the way it was supposed to be. Now I know there is a problem but don't know what to do about it. I will look at the bouncing the bike on the front tire test but will have to admit when I read it, I conjured up a picture of a goldwing being held up by a bunch of guys standing on its front tire!

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: bad ride at 25

Postby virgilmobile » Mon Oct 17, 2011 11:00 am

No.I did that test method to verify that my binding was due to the bent fork.
The easy test is this.
2 people,one on each side.
Both push the front end down and let it come back on its own.
Use a magic marker and mark the fork at the dust cap.
Both people lift the front end up.Don't try to pick it up off the ground,just lift it to extent the forks.
Let the bike rest back down under its own weight.
Look at the mark.
It's suggested that there should be no more than 1/2 " difference.

All this time let the weight of the bike settle the forks.Keep it balanced upright(the need for the second person)

On my 1100 the static difference was 3 1/2 ".Now that I fixed the bent fork,new slides,seals,polished,and oil,my static has reduced to 3/4 ".not perfect but much better riding.

Also check the tire pressure and air pressure in the forks.Everyone sets different.I run 36 psi in the tire and 5 psi in the forks(measured on the center stand)

Randy-1
Posts: 6
Joined: Sun Oct 16, 2011 12:24 pm
Location: Lynden, WA
Motorcycle: 1986 GL 1200 Aspencade

Re: bad ride at 25

Postby Randy-1 » Mon Oct 17, 2011 12:11 pm

I went to the link that suggest to use HD parts. My concern with that is not the HD part, but from a non-mecanics point of veiw it seemed like you had to modify things a bit and without those tools I would have to take it to a machine shop wouldn't I? I'm sure it will be cheaper than getting new shocks.

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: bad ride at 25

Postby virgilmobile » Mon Oct 17, 2011 3:00 pm

I went to HD parts for the slide bushings because both use SHAWA shocks and the same size fork tubes.Although I did find that for the 2 bikes(total of 8 slide bushings)only one set was a perfect match.The rest had to be modifies to fit.
So I suggest if you have to rebuild your front end to replace parts with OEM Honda parts.

Buying a set (used)off the net may result in a set that is in the same condition as what you have.

It's not difficult to restore the shocks if you have a few basic tools and the parts.With instructions it takes about 4 hours.
The worst case is if a fork is bent,but a local machine shop or bike shop can usually get them straight for a few bucks.
There is a lot of detail involved in this repair and it will take time to get it right.




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