MZ/MuZ Riders

I need a new rear shock for my scorpion sport, I've read somewhere that a FZR600 shock will fit. Has anyone tried this is it a straight swap or would I need to modify the linkage?

Has anyone got any tips or information on reconditioning the existing shock

Thanks any info appreciated

I thought it was the FZR750 shock but there are several models and I never narrowed it down. In short, I don't know for sure which shock would work. My suspension guy told me to pull the shock off and bring it to him so he could measure length and stroke and build one for me. That route probably isn't as cheap as what you are looking for. Can't help on rebuilding the original equipment. Don't know anything about it.

fzr shock fits straight in with no mods (I've got one if you want it, but I am in OZ), but the spring is way to soft, so you need to get a stiffer spring. I had my original shock rebuilt, it cost about au$300 (but now can be rebuilt over and over) though for best results you need to get a softer spring or the original spring retempered.

timston wrote:I need a new rear shock for my scorpion sport, I've read somewhere that a FZR600 shock will fit. Has anyone tried this is it a straight swap or would I need to modify the linkage?

Has anyone got any tips or information on reconditioning the existing shock

Thanks any info appreciated

Hey I noticed your not far from me. I'm in Holmfirth btw.

crunchybits4 wrote:fzr shock fits straight in with no mods (I've got one if you want it, but I am in OZ), but the spring is way to soft, so you need to get a stiffer spring. I had my original shock rebuilt, it cost about au$300 (but now can be rebuilt over and over) though for best results you need to get a softer spring or the original spring retempered.

Can you tell us which year and model? I've never seen it confirmed on this forum and it would be nice to have it listed in case anyone runs across this in the future. Thanks.

'98 sport, its the fzr 600 shock fits that fits straight in, apparently you can use the spring off an fzr1000 on the 600 shock

If you need some reference about a proper shock this list is helpful: https://www.ohlins.eu/download/Ohlins_DTC_oehlins-recommendation-list-motorcycle-2015--293.pdf

This list did the trick for me. The original shock is 305mm center to center unloaded with around 46mm stroke. If you use a shock with more stroke the spring will be to soft. A stronger spring will compensate, but the shock will have a tendency to be under damped giving a wallowing rear end... some comparison available at my blog: http://hajokootstra.blogspot.nl/2016/02/meting-linksysteem-achterbrug.html

As an example: a 2008-2014 Honda CB 1000 r shock seems right at first glance: 310mm length and 47mm stroke. Just the right stroke and raising the rear end of the bike about half an inch. Don't know if it has the right mounts however. A used original shock like that will probably be cheaper, available and is at least 15 years newer than a FZR shock

Thanks for your replies

It would appear that rebuilding the original shock is not possible. I can't see any way of dismantling it and my local suspension specialist wouldn't touch it.

So replacing the original with a more modern one seems the way to go. After some research and reading Hajoks excellent blog I have narrowed my search down to a shock from either an 05/06 cbr600rr or an 06/07 R6.

A question for hajok if I go for the R6 which is 293mm (+5/-1) CTC long with a stroke of 60mm, will it work with the gsxr linkage you used with the CBR shock?

You did some good research . This R6 Shock could work as well, although the ride hide can only be maintained with shorter dogbones. I use 151mm ctc dogbones which give a ride height of about +16mm compared to original with the 312mm ctc WP 4618 (Honda CBR 600) shock and Suzuki linkage. The Suzuki linkage has a 55/92 (mm) ratio, which means the dogbones should be around 10mm shorter (141mm) compared to my setup (i.e. R6 shock 295mm ctc: (312-295)*55/92 = 10,16mm). For the original ride height 147mm dogbones are close.

Maybe I should mention a disclaimer: "good functioning nor proper fitting is guaranteed"

timston wrote:
It would appear that rebuilding the original shock is not possible. I can't see any way of dismantling it and my local suspension specialist wouldn't touch it.

here's a photo of the top of the original shock I had rebuilt, totally rebuilt - to be rebuildable, it can be done to virtually any shock, SOS suspension in Penrith (AUS) did this work http://www.sossuspension.com.au/, The socket head cap you can see is to recharge the gas. maybe your local suspension specialist isn't really that good?

I agree crunchybits4, we have suspension `specialists` in the UK that will rebuild ANY shock absorber. Whether it`s cheaper than sourcing a good second hand and more adjustable version is another question.

crunchybits4 wrote:The socket head cap you can see is to recharge the gas. maybe your local suspension specialist isn't really that good?

It's been ~18 years since I put food on the table by tuning motorcycle suspension, but emulsion-type shocks don't have a "gas charge" as in a pressurized system. The hole is simply to remove the old oil and replace it with fresh, the screw simply seals up the hole.

Oops, remembering wrong (and found the Race-Tech page on rebuilding non-rebuildable shocks here ~ http://www.racetech.com/page/title/SPNV%20Installation ), so apparently there IS some pressure which means the OEM units were assembled in a pressurized environment. Not sure how the shop would pressurize the shock crunchybits4 has (and I never personally did this, I was working on aftermarket units from Fox, Ohlins and Penske mostly).

Agreed, unless a valve was fitted to the shock it would be impossible to pressurise through an M6 tapped hole sealed by a cap head screw.
I think it`s the point of `remove and refill` with oil.

I'm having my adjustable modern shock built right now. I'll let y'all know if the tech finds a suitable replacement that could be ordered by anyone and bolted on, or if he had to do some modifications to get the length and stroke close enough to work without changing out other link parts.

Fitted this Hagon shock to my Sport , its got variable damping with automatic rebound and compression balance and it is nicely made. After a short trip on a bumpy B road, it seems to have lots of travel, damps well and offers a controlled ride with no trace of bounce or harshness. Hagon build them to suit rider weight at no extra cost, I had mine built for solo riding with a lighter spring which gives me a bigger window of adjustment. Shame about the front end now, as it shows up its lack of sensitivity.