GL1100 Rear Shock Issues


Information and questions on GL1100 Goldwings (1980-1983)
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tbpmusic
Posts: 2
Joined: Fri Dec 24, 2010 10:56 am
Location: LaPorte,IN
Motorcycle: 1981 GL1000

GL1100 Rear Shock Issues

Postby tbpmusic » Sat May 30, 2015 11:45 am



Hi -

1981 GL1100 (necked), one owner (100% sure of that), shocks have never been off the bike (99% sure of that).
Rebuilding the rear shocks, all went as suggested in the Honda manual - until I try to add the fluid. Old fluid was not funkified, just not much of it.
The manual specifies 12.5 ounces of ATF - no way, I've tried adding fluid from the bottom (before putting the seal and all in), as well as from the top (turkey baster through the air fitting).
In both cases, a bit less than 10 ounces is all it will take before overflow.

My question(s) - is that 12.5 ounce figure in error?
Is the technique to completely fill the shock, with no air space on top?
If not, what sort of air volume on top is required?
I'm at a total loss here, appeals to other forums elicit no response as yet.
I'm considering using 8 ounces and leaving a 2 ounce volume of air on top - is this crazy??


It's NEVER straight up and down......

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CMReynolds1
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Location: Oregon
Motorcycle: 2013 F6B

Re: GL1100 Rear Shock Issues

Postby CMReynolds1 » Sat May 30, 2015 4:48 pm

The 8 ounce with air seems like a starting point. Try it and see how it does. Worst that would be you go back and add some more. At least it is worth the try in my mind.
Ride Safe,
Taz


TF 116, RivRon 512, Can Tho, S. Vietnam, 8/66-/9/68, GM(G)2

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roadwanderer2
Posts: 4109
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
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Re: GL1100 Rear Shock Issues

Postby roadwanderer2 » Sat May 30, 2015 5:03 pm

take a look at this link, its a pretty easy way to refill your rear shocks.......





stuart.

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Wilcoy02
Posts: 725
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: GL1100 Rear Shock Issues

Postby Wilcoy02 » Sat May 30, 2015 7:19 pm

That one percent of shocks being off before. Well could be the po replaced the springs with progressive in which case 10 oz would be full.

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tbpmusic
Posts: 2
Joined: Fri Dec 24, 2010 10:56 am
Location: LaPorte,IN
Motorcycle: 1981 GL1000

Re: GL1100 Rear Shock Issues

Postby tbpmusic » Sat May 30, 2015 7:26 pm

Thanks, I've already seen all the videos and read all the posts I could find.

Is the idea to completely fill the shock with fluid??
It's NEVER straight up and down......

User avatar
Wilcoy02
Posts: 725
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: GL1100 Rear Shock Issues

Postby Wilcoy02 » Sat May 30, 2015 9:31 pm

I do not know if it is full or not. I just poured the oil in while I had the springs out. I do not believe it was full. I put progressive springs in and instructions was to use 10.5 oz. I believe the manual calls for 12.5 oz.




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