Progressive front springs?


Information and questions on GL1500 Goldwings (1988-2000)
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Sadanorakman
Posts: 491
Joined: Tue Sep 19, 2017 1:42 pm
Location: Midlands, ENGLAND
Motorcycle: 2000 GL1500 SE (Blue)
1991 GL1500 SE (Gold)

Progressive front springs?

Post by Sadanorakman »



Considering fitting progressively-wound front springs to my 2000SE, and am in the UK.

1. Anyone fitted 'YSS' springs and can vouch for their quality?

2. Anyone know how the Spring rate of these compares to the originals and also compared to the American 'Progressive' brand springs (Which are too costly for me because of import duties and tax)?
These are listed as:
Spring rate 1: 8.5 N/mm,
Spring rate 2: 12 N/mm,

3. Spring length:
These are quoted as 490mm long for years 1998, 1999, and 2000.
They also list a 520mm long version for 1988 through 1995.
Is this correct? Are the forks shorter on the later gl1500's?

Many thanks in anticipation 👍


Measure twice, cut once.
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newday777
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Motorcycle: 2008 Cabernet Red. Level 4 bought at 15,000 now 172,000

1975 CB750 K5 Planet Blue 11,00 miles

Project bikes
1976 CB750 K6 Anteres Red 25,000 miles, 2 more K6s, 1 K4, 1 K8

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1983 GL1100A Wineberry 63,000 miles(sold)

1999A Restored from PO neglect & sold at 19,000 miles

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Re: Progressive front springs?

Post by newday777 »

Personally having run the Progressive brand, stay away from them. I've bottomed the forks out on my 99 with them hitting a hard bump.
Get a single rate spring rated for your weight and load weights. Far better ride. Racetech and Traxxion both offer single rate springs.
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Sadanorakman
Posts: 491
Joined: Tue Sep 19, 2017 1:42 pm
Location: Midlands, ENGLAND
Motorcycle: 2000 GL1500 SE (Blue)
1991 GL1500 SE (Gold)

Re: Progressive front springs?

Post by Sadanorakman »

Thank you @newday777

Very worthwhile considering single-rate springs I guess. Not sure how easy they will be to find in the UK though, and I would like to avoid importing if possible.

I guess I'd just like to stiffen up the front end a bit, as find it too vague, and it does bottom out a bit too easily. Fresh fork oil will help I'm sure, but I would like firmer spring rate too.

Does anyone else have the answers to spring length and rates that I asked please?
Measure twice, cut once.
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newday777
Posts: 2413
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH
Motorcycle: 2008 Cabernet Red. Level 4 bought at 15,000 now 172,000

1975 CB750 K5 Planet Blue 11,00 miles

Project bikes
1976 CB750 K6 Anteres Red 25,000 miles, 2 more K6s, 1 K4, 1 K8

Past rides
1983 GL1100A Wineberry 63,000 miles(sold)

1999A Restored from PO neglect & sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Progressive front springs?

Post by newday777 »

Even with straight rate Traxxion and Racetech springs you have to cut the included aluminum tube preload spacer when installing them. There probably won't be just specific springs without a preload spacer available.
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Sadanorakman
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Joined: Tue Sep 19, 2017 1:42 pm
Location: Midlands, ENGLAND
Motorcycle: 2000 GL1500 SE (Blue)
1991 GL1500 SE (Gold)

Re: Progressive front springs?

Post by Sadanorakman »

Ok thanks. So you adjust preload by adding (or removing) a spacer. I didn't know that, but it makes mechanical sense I suppose.
Measure twice, cut once.
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blupupher
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Re: Progressive front springs?

Post by blupupher »

Do you have a fork brace installed?
Current ride: 2013 BMW K1600GT

Former rides: 2002 GL1800A, 2001 CB750, 1994 GL1500 SE, 1994 VT1100C , 1984 VF500F, 1982 CB750C, 1982 GS250T, 1981 CB900C, 1978 CB125s, 1976 TS185
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Sadanorakman
Posts: 491
Joined: Tue Sep 19, 2017 1:42 pm
Location: Midlands, ENGLAND
Motorcycle: 2000 GL1500 SE (Blue)
1991 GL1500 SE (Gold)

Re: Progressive front springs?

Post by Sadanorakman »

blupupher wrote: Mon Jan 16, 2023 5:23 pm Do you have a fork brace installed?
Am planning on fitting one at the same time as swapping the springs.


Measure twice, cut once.
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