Author Topic: YSS rear shock  (Read 6299 times)

Offline drut

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YSS rear shock
« on: September 02, 2024, 12:30:21 PM »
Fitted new YSS rear shock to my K100rs 16v,seems nicely made and fits well but not having any luck finding rebound damping"sweet spot". Just wondering if anyone else is using a YSS and what sag/rebound settings they found good,I weigh 170lbs.
  • Newcastle upon Tyne UK
  • 1990 K100RS + 1980 Moto Guzzi V50 II + 1971 Aermacchi/HD 350ss
Much older but certainly no wiser!

Offline The Mighty Gryphon

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Re: YSS rear shock
« Reply #1 on: September 02, 2024, 02:34:01 PM »
It's been over 5 years since I put one on my bike, but I seem to recall that the instructions that came with it covered tuning it.  Mine came setup for me and the bike at the factory after I answered some questions about weight, bike and riding style. 

Have you tried contacting YSS for a setting and tuning instructions? 
  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Martin

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Re: YSS rear shock
« Reply #2 on: September 02, 2024, 02:55:28 PM »
Same as Gryph, YSS asked me a heap of questions and they set the shock up accordingly. I was extremely impressed from the day it went on and I've never changed the factory settings. I was also impressed with their feedback, I got emails informing me of the whole process virtually daily. I ordered it on Monday from Melbourne and got it back 6 days later from the Netherlands. As per Gryph I believe YSS will tell you how to set it up if contacted.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Laitch

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Re: YSS rear shock
« Reply #3 on: September 02, 2024, 03:08:54 PM »
YKK instructions.


  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline drut

  • ^ Proficient Motobricker
  • Posts: 391
Re: YSS rear shock⁷
« Reply #4 on: September 02, 2024, 03:17:03 PM »
Thanks for your reply,followed YSS setting up instructions and got near to right but no better than Showa it replaced.Contacted  shock supplier as I have a feeling that I may need a lighter spring but told not available so may have to  :flyoffvisit suspension specialist. Was hoping someone bigger built than me/travels fully loaded finds it fine to confirm this. Just  read Martin's post: Dealt with  UK supplier and not given any options to set up to suit my weight etc.Shock came set on 16 rebound clicks and sag about 1 1/4 in,tried varying rebound from 8-20 but cannot find an ideal setting.
  • Newcastle upon Tyne UK
  • 1990 K100RS + 1980 Moto Guzzi V50 II + 1971 Aermacchi/HD 350ss
Much older but certainly no wiser!

Offline Glaucs

  • Curious
  • Posts: 1
Re: YSS rear shock
« Reply #5 on: September 02, 2024, 04:34:50 PM »
Hi all, I fitted one on the 85  K100rt in just before the pandemic. I watched some set up guides and went with that. I was happy that even though I ordered the one that was supposed to be a direct replacement for the stock unit it was noticeable a lower ride. This was an instant improvement for me as I could place me feet flat on the ground. I then dropped the front forks in the clamps down a bit and hey, better ride. So many utube videos tell me the geometry will be all wrong , but that is not my experience. I ride two up a lot with luggage and I am very happy. The only thing I don't like is that the black powder coat is coming away from the spring. But hey that is just powder coat. Cheap to apply so they use it. As for the adjustment set up. Just follow the instructions or a good utube.
  • Peak View NSW
  • 1985 k100rt

Offline Laitch

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Re: YSS rear shock
« Reply #6 on: September 02, 2024, 06:29:24 PM »
I set free sag at 32mm wearing my usual riding gear, helmet and boots. Of course, I had a friend making and double-checking the measurements because I was on the Brick during sag measurement. Once that was established, I set the rebound damping at +10 clicks and went from there. To get comfortable on the rough gravel of local roads, I needed to reduce damping adjustment almost completely—maybe two clicks remaining—but then things were good and have stayed good during the four years it has been installed, so don't be shy about rotating that adjuster as far as you want for the effect that you need. I believe the spring was too stiff for my weight but the Brick handles gravel and pavement acceptably plus I have plenty of adjustment for pillion riders, or cargo, of titanic weight.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline drut

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  • Posts: 391
Re: YSS rear shock
« Reply #7 on: September 03, 2024, 02:54:36 AM »
Thanks for the replies,it's good to know people are happy with these shocks.Will try further adjustments.
  • Newcastle upon Tyne UK
  • 1990 K100RS + 1980 Moto Guzzi V50 II + 1971 Aermacchi/HD 350ss
Much older but certainly no wiser!

Offline blackie1

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  • christchurch nz
Re: YSS rear shock
« Reply #8 on: September 03, 2024, 03:27:15 AM »
wasn't it easier in the past when you had only 3 x spring settings plus only a half turn of the hard/soft dampner to contend with and you just got on and rode it  112350
  • christchurch, new zealand , where else would u want to live, really
  • 1991 K75RT naked 67,000kms