Problem with OEM shock rebuild, question about progressives - Steve Saunders Goldwing Forums

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post #1 of 19 (permalink) Old 08-28-2017, 06:09 PM Thread Starter
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Location: Ohio, Cincinnati
Year: 1985
Make: Honda
Model: GL1200 Interstate
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Problem with OEM shock rebuild, question about progressives

Bike: 1985 GL1200 Interstate

I got my new seals in the mail today, so I started the rebuild process after work and this is what I found. I'm guessing its from the incorrect type of fluid previously used some time in the past. The black rubber wad you see on the work bench is what remains of the bump stop, it feels like a milky oily mushy mess. It pulled right off the shaft. The other shock was the same, all the internals cleaned up nicely except for the last bit of rubber goo that was inside the piston assembly.

Looking at schematics, I don't see the shock broken down far enough to order the bump stop.

Anyone know of an aftermarket source for getting these, or has anyone had a similar situation?



Part 2... I really don't want to spend the extra cash (bike has new engine, fresh fork rebuild, new radio and speakers, and new tires all within the past month... $$$$ hah) on new aftermarket progressive shocks, and I really like the ability of having an adjustable ride height with the OEM shocks. Anyone in here that has Progressive shocks and rides mostly solo? I weigh 178lbs soaking wet, ride mostly solo, and carry little to no luggage... are the 412's adjustable enough that I would have a smooth ride, and not get jarred from the seat?
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post #2 of 19 (permalink) Old 08-28-2017, 06:26 PM Thread Starter
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Well I kind of answered my own question regarding the bump stop in here: https://www.goldwingfacts.com/forums/...k-rebuild.html (missed this thread the first time I searched)

I guess now that I have a source, unless someone knows of one that will be a more direct fit, I will go ahead with the OEM rebuild. I need to figure out how to fully take apart the piston rod assembly now

I'd still like to hear some insight on the progressive shocks though!
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post #3 of 19 (permalink) Old 08-28-2017, 07:01 PM
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You have it apart as far as it will go without cutting it open. Just find a bump stop like in that thread and fill it with oil and it will ride surprisingly better than before.

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post #4 of 19 (permalink) Old 08-28-2017, 07:04 PM Thread Starter
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Success at the local auto parts store! They will have to be drilled out, as the member does in the thread I linked, but they should work.

And a pic for anyone searching in the future, this may help.
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post #5 of 19 (permalink) Old 08-28-2017, 08:06 PM
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Here is a link to how I did the rear shocks.
The last one has the part numbers for all that is replaced.
I did replace the spring with progressive.


http://goldwingdocs.com/forum/viewto...p?f=11&t=36307
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post #6 of 19 (permalink) Old 08-28-2017, 08:15 PM Thread Starter
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Quote:
Originally Posted by DaveO430 View Post
You have it apart as far as it will go without cutting it open. Just find a bump stop like in that thread and fill it with oil and it will ride surprisingly better than before.
That's what I figured after going back down to the garage. I cut the tops off of 2 empty cans of brake cleaner and they are now soaking in thinner overnight
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post #7 of 19 (permalink) Old 08-28-2017, 08:20 PM Thread Starter
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Quote:
Originally Posted by Wilcoy02 View Post
Here is a link to how I did the rear shocks.
The last one has the part numbers for all that is replaced.
I did replace the spring with progressive.


http://goldwingdocs.com/forum/viewto...p?f=11&t=36307
Awesome, thank you.
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post #8 of 19 (permalink) Old 08-28-2017, 08:25 PM Thread Starter
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It was actually a direct fit. The pack cost $6 at Advance Auto

I dunno why the pictures are turning sideways, they're right side up on my desktop
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post #9 of 19 (permalink) Old 08-28-2017, 09:27 PM
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Progressive air shocks report:
From using 416 dual airs on a 1500, solo at your weight 8 to 15psi will yield a very sane and smooth ride.
Not much real action in them till 5psi

Do the OE have a support spring inside, or just air support only?

If you want super comfort, on top of seat put an Airhawk Cruiser R seat cushion, $110,
Your butt, floating on a 10mm layer of air--- opens YOU to the Wings real all day and the next cruising ability.
Cruiser R has an special pattern placement of the air cells, leaving an open center channel
so no pressure on the tailbone (ahhhhhhhhh) enlarged prostate (OOwOOwOOOw) or any low hanging family fruit.

Do the drop test, not drop the bike! Measure the amount the rear end drops when you go from standing straddling the bike -
to seated on it with your full weight.
A 1 to 1.5 inch drop is considered in the correct range of suspension pre-load

Last edited by Aloha Tom; 08-29-2017 at 10:06 AM.
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post #10 of 19 (permalink) Old 08-28-2017, 10:18 PM Thread Starter
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Thank you, great info about the progressives!

OE has 2 internal springs with air assist

I never thought about adding a seat pad, I don't have much cushioning myself lol, so I may look into that.

And I will definitely be checking the preload once it is back together. Is the front supposed to have the same amount as well?
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