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I have an '88 GL1500 with about 100,000 miles on its set of Progressive Fork Springs (135,000 miles on the bike.) It's time for new fork seals and I'm wondering what is the expected life of these springs. How can I inspect them and do they have a finite life?

Any advice on inspection/consideration?

Thanks.

Jack
 

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Jack Joyce wrote:
I have an '88 GL1500 with about 100,000 miles on its set of Progressive Fork Springs (135,000 miles on the bike.) It's time for new fork seals and I'm wondering what is the expected life of these springs. How can I inspect them and do they have a finite life?

Any advice on inspection/consideration?

Thanks.

Jack
The manf. of those springs should have a length spec for 'em.
 

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Jack Joyce wrote:
I have an '88 GL1500 with about 100,000 miles on its set of Progressive Fork Springs (135,000 miles on the bike.) It's time for new fork seals and I'm wondering what is the expected life of these springs. How can I inspect them and do they have a finite life?

Any advice on inspection/consideration?

Thanks.

Jack
In the early days, 1980 and 1990's, Progressive was using a two part spring. Meaning there were two separate springs (upper and lower) installed in each fork leg.

Then they came out with a new type spring, just one spring in each fork leg. The new fork spring for the GL1500 is part # PS11-1152. I have them in my '99 Gold Wing.
You can read about the new fork springs here:

http://www.pricedright.co.uk/view-item.cfm?stockid=788

I know the new Progressive fork springs are warranted for life. Not sure about the older style springs.

I would recommend contacting Progressive concerning technical questions and warranty issues.

http://www.progressivesuspension.com/contact.html

They will know more about their products than any of us here on this message board.
 

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How does it feel...
Here is a worksheet w/instruction on your fork spring math...

http://motorcycleinfo.calsci.com/Suspension2.html

You can formulate/calculate every aspectabout the bike, but... how does itrespond to you and the way you ride it? If doing the work yourself, it's inexpensive and relatively easy to tailor. Nows the time.
 

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It should be good for life, but then how long is life :DMeasure your type against a new set.
 
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