Another rear shock question

Squinternotto Posts : 4 Join date : 2021-05-18

Hi everyone,

First of all thanks to everyone posting here! I love all the info, tips etc here.

I should change my user name, as I have a beautifull orange GRiSO 1100! I love the bike.

I'm a 186 tall guy weighing in at around 90kg in my birthday suit. The ride is great for me, but when my tiny girlfriend joins me, we bottom out.

I thought changing the coil on the rear would improve thing on a reasonable budget. I have difficulty finding a good/confirmed spring replacement.

I've emailed hyperpro, but they are not helpful and say they don't sell a spring for the GRiSO. I thought it was weird, as there are a lot of sources stating they did have one.

Does anybody know if a good spring I could put on the stock shock?

GRiSO Capo Posts : 1247 Join date : 2015-01-04 Age : 61

Probably easiest to find a local supplier and whatever springs/brands they supply but I use Faulkner springs and buy in UK at Demon Tweeks (see pic from website). To fit the OEM Sachs unit you just need to choose 2.25 inch internal diameter and 180mm (7 inch, I think Stelvio shock uses almost same size spring). I'm assuming you have a spring compressor ! Note HyperPro usually offer progressive springs & the ones I'm pointing to are just linear

Here are details of std spring rates (apparently roughly 10kg/mm) so you can think how much stiffer to go....most people go to above at least 11kg/mm [You must be registered and logged in to see this link.]

There are loads (and then some) of threads on spring rates and valving and other options
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Tanabuso Posts : 68 Join date : 2021-02-03 Age : 63

iwantone wrote:: Hi everyone,

…I'm a 186 tall guy weighing in at around 90kg in my birthday suit. The ride is great for me, but when my tiny girlfriend joins me, we bottom out.

I thought changing the coil on the rear would improve thing on a reasonable budget. I have difficulty finding a good/confirmed spring replacement…

Does anybody know if a good spring I could put on the stock shock?

I had similar problems on my GRiSO even though the previous owner had put on a heavier RaceTech spring. With the factory setup it is really difficult to switch back and forth between solo and pillion riding as accessing the adjustment rings is a pain. I opted to spend the big bucks and put the hydraulically adjustable Matris R shock on the rear, with the spring rate calculated for 240 lbs (108kg) solo and 380 lbs (172kg) pillion combined. At that point things were good with no preload for solo and +5mm for pillion. However, we’ve both lost weight, 50 pounds (23kg) in my case, so I may need to order a different spring.

Squinternotto Posts : 4 Join date : 2021-05-18

Thank you very much.

I don't have the tools, so I'm going to see a specialist for it. I'll report back if I change anything and what I've chosen to do.

Nibbio Posts : 593 Join date : 2021-07-30 Age : 59

I heard a spring change makes little to no difference, its always going to be a harsh ride as there's no travel unless your around 70 kilos max.
Tools who needs tools, two cut down ratchet straps off amazon for 10 euros it's as easy as.
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By the time you've paid a specialist to remove the shock off the bike,
re-spring the thing, will prob come with a service of the shock, you'll be up to the price of a new one.
Link him in to the

paulbrice wrote:: Stelvio shock

thread dude Laughing

Squinternotto Posts : 9 Join date : 2014-12-03

Has anyone had good results with getting the standard GRiSO rear Sachs shock rebuilt? My 1100 GRiSO has done about 40,000 klms now and my back is taking a pounding on our crappy roads. I'm looking at about $250 AUD to have a local motorcycle suspension shop rebuild it versus $849 AUD to buy a basic shock from Hyperpro.

GRiSO Capo Posts : 8963 Join date : 2013-05-29 Age : 65

My advice would be go with the Hyperpro. The Sachs unit is really pretty horrible.

GRiSO Capo Posts : 87 Join date : 2018-04-24

Pete Roper wrote:: My advice would be go with the Hyperpro. The Sachs unit is really pretty horrible.

I don't see a Hyperpro spring available for the GRiSO on their website available in the US. Have you found it somewhere else?

Thanks

GRiSO Capo Posts : 8963 Join date : 2013-05-29 Age : 65

I deal directly with their agent in Oz. I haven't bought a spring separately, only whole shocks and I haven't measured the ID/OD of the springs exactly. Sorry.

Tanabuso Posts : 84 Join date : 2021-11-17

paulbrice wrote:: Here are details of std spring rates (apparently roughly 10kg/mm) so you can think how much stiffer to go....most people go to above at least 11kg/mm [You must be registered and logged in to see this link.]

As far as I understand the spring of a Stelvio shock is 188 mm long.
I see from the link you give that Öhlins have two versions that could fit, one is 180mm (1095-) and the other 190mm (1096-).
Which one to go for, - and why?

GRiSO Capo Posts : 915 Join date : 2016-01-25 Age : 67

It will make little difference as the GRiSO spring adjustment is continuous so you can fit the spring to any length you want. If, for example, you adjusted the fitted spring to 180mm long the standard 9.6kg/mm spring would be preloaded 8mm that is 77Kg, the 180 mm spring would have no preload or the 190mm spring would have 96Kg of preload.

As the GRiSO has little suspension travel I would choose the longer one to give you more options.

GRiSO Capo Posts : 87 Join date : 2018-04-24

Pete Roper wrote:: I deal directly with their agent in Oz. I haven't bought a spring separately, only whole shocks and I haven't measured the ID/OD of the springs exactly. Sorry.

Thanks Pete...will contact HyperPro directly and see if I they have an option here.

GRiSO Capo Posts : 8963 Join date : 2013-05-29 Age : 65

Walter may tell you to get in contact with me as we've been working closely on shock options for the GRiSO.

Tanabuso Posts : 84 Join date : 2021-11-17

lcjohnny wrote:: It will make little difference as the GRiSO spring adjustment is continuous so you can fit the spring to any length you want. If, for example, you adjusted the fitted spring to 180mm long the standard 9.6kg/mm spring would be preloaded 8mm that is 77Kg, the 180 mm spring would have no preload or the 190mm spring would have 96Kg of preload.

As the GRiSO has little suspension travel I would choose the longer one to give you more options.

Thanks again Smile

GRiSO Capo Posts : 87 Join date : 2018-04-24

Pete Roper wrote:: I deal directly with their agent in Oz. I haven't bought a spring separately, only whole shocks and I haven't measured the ID/OD of the springs exactly. Sorry.

Thanks again Pete.

Good news for US GRiSO owners. I spoke with EPM Performance Imports today, they are the importer for Hyperpro products here in the U.S.

If anyone wants to just replace the spring, not build a custom shock, then spring #1224 will work for the GRiSO. Although the website doesn't show it as an option on their drop down list, it is available now.

If anyone else wants to contact EPM, reach out as per below info I received today:

EPM Performance Imports
Email: [You must be registered and logged in to see this link.]
Phone/ Fax: 732-786-9777
[You must be registered and logged in to see this link.]

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