What difference will it make if I raise 7mm to rear shock. putting ohlins shock. : Suzuki GSX-R Motorcycle Forums: Gixxer.com
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Old 11-11-2012, 12:00 AM   #1
youngblood750
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What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

I recently got Ohlins Shock absorber 46PRXLS (SU347) came off from 05 gsx-r750. Mine is 00 r750.

I think it will be great upgrade for my bike.

before I bought it, I knew OEM rear shock of 05 r750 is 7mm higher than mine (00 r750) from Interchangability thread.

and One guy said, raising 7mm in the rear will make bike handles better. So I decide to get Ohlins shock when It showed up with affordable price without not much of thinking.

Quote:
Suzuki GSX-R600 01-03***325.5mm | 8.0kg/mm | 450lb/in
Suzuki GSX-R600 04-05***332.5mm | 7.6kg/mm | 425lb/in
Suzuki GSX-R600 06-10***320mm | 9.4kg/mm | 526lb/in

Suzuki GSX-R750 00-03***325mm | 7.2kg/mm | 400lb/in
Suzuki GSX-R750 04-05***332.5mm | 7.3kg/mm | 408lb/in
Suzuki GSX-R750 06-07***320mm | 9.5kg/mm | 532lb/in
Suzuki GSX-R750 08-10***320mm

Suzuki GSX-R1000 01-02***329.5mm | 7.7kg/mm | 430lb/in
Suzuki GSX-R1000 03-04***332mm | 8.6kg/mm | 480lb/in
Suzuki GSX-R1000 05-06***325mm | 8.1kg/mm | 454lb/in
Suzuki GSX-R1000 07-08***315mm | 10.1kg/mm | 566lb/in
Suzuki GSX-R1000 09-10***320mm | 11.6kg/mm | 650lb/in
If I put recently purchased Ohlins shock to my bike, It will raise 7mm higher on the rear. Ohlins shock has Length adjuster, but it can only make it higher(+6mm) not downward.

Quote:
Setup data for SU 347
Shock absorber length 332.5 (+6/-0) mm
Shock absorber stroke 74 mm
Spring pre-load 10 mm
Rebound damping adjuster 14 clicks
High speed comp. damping adj. 25 clicks
Low speed comp. damping adj. 10 clicks
when I saw that length adjustable nut on the shock, I was expecting that I can lower it so it can be close to previous height, but no way.. solid 7MM higher.



Even though golden colored shock is in my hand, I want to make sure what I'm getting it before I put it and run the bike.


I heard people do raise rear for better setup.

My question is, raising 7mm is in the normal range? or too much?

one fortunate thing is, I asked to seller and he said, previous owner of Ohlins shock has pretty much same weight as I do.

and My another concern is the chain buffer("chain guide" in other term). Since making 7mm higher will cause edging the swing arm angle. hope chain won't grind off the chain buffer from it.



thanks for reading. any advice and input will be appreciated!

Last edited by youngblood750; 11-11-2012 at 03:26 AM.
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Old 11-12-2012, 12:31 PM   #2
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

G funk runs an Ohlins 05 750 spec shock with no problem.
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Old 11-12-2012, 12:39 PM   #3
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+7mm in rear is not outside normal realm a
Of adjustment but you will likely need to adjust front height to avoid a twitchy front end did to lack of rake or trail or both
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Old 11-12-2012, 07:07 PM   #4
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

One query.

The 750 04/05 spec shock is 7.5mm longer than the 01-03 750 we agree.

But once fitted what does this equate to via the shock linkage ratio in actual rear wheel travel ?? I'd say if the ratio is 2.2 (a guess, don't know what it actually is, but one of my old cradle frame gsxr's was this, though i know the 01-05 ratios are the same) then the actual lift compared to standard is : extra length 7.5 * ratio 2.2 = 16.5mm actual ride height increase ????
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Old 11-12-2012, 07:14 PM   #5
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Quote:
Originally Posted by dan uk View Post
One query.

The 750 04/05 spec shock is 7.5mm longer than the 01-03 750 we agree.

But once fitted what does this equate to via the shock linkage ratio in actual rear wheel travel ?? I'd say if the ratio is 2.2 (a guess, don't know what it actually is, but one of my old cradle frame gsxr's was this, though i know the 01-05 ratios are the same) then the actual lift compared to standard is : extra length 7.5 * ratio 2.2 = 16.5mm actual ride height increase ????
Don't over think it lol.

Most people only concern themselves with the change at the shoclt
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Old 11-13-2012, 07:52 PM   #6
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Quote:
Originally Posted by Moto_Joe View Post
+7mm in rear is not outside normal realm a
Of adjustment but you will likely need to adjust front height to avoid a twitchy front end did to lack of rake or trail or both
thanks!

I have extra 4mm that I can raise front forks. I think OEM spec is 4mm down on front fork. and hope that dialing up a couple of more click on ohlins steering damper would help twitchy front end.
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Old 11-13-2012, 07:59 PM   #7
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

Cranking down a damper is not the proper way to make a bike handle. The damper is a safety device, not a handling device.
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Old 11-14-2012, 05:00 PM   #8
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

Quote:
Originally Posted by Moto_Joe View Post
Cranking down a damper is not the proper way to make a bike handle. The damper is a safety device, not a handling device.
right..



I will gradually increase the speed on straight and check how the front feel after i put new shock.

well, here gets cold. I also need to service the forks.

I think I will see the result next spring

Last edited by youngblood750; 11-14-2012 at 09:25 PM.
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Old 11-25-2012, 11:46 AM   #9
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.




I pulled OEM shock out and put gold one in.

yep. rear shock for 05 r750 is little longer than 00-03 r750.







I couldn't tell what difference it made. because I couldn't ride out. since I still have other issue to fix it.

wish I can feel the difference next season when my bike is ready for trackday.

at least I can say one thing, Ohlins shock is really firm and stiff comparing to OEM one.

I sat on the seat and didn't feel that rear got higher than I expected. well, but it's really firm and stiff for sure..



I also have forks with Ohlins internal. OEM front fork with Ohlins internal. but seal is leaking.

winter is coming. So it's good time to learn How to service them.




(it need some special tool to open the cap first. I gotta buy it or make it..)



I need to study a lot this winter. servicing a fork, how to set up the suspension right...



well, I have no track experience and never ride hard on corner. but planning to build my bike suitable for track and myself...

I wish that I have some luck in next year.

Last edited by youngblood750; 11-25-2012 at 11:51 AM.
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Old 11-25-2012, 12:25 PM   #10
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

You would be much better suited to learning to ride the bike like it is, than throwing random parts at your bike that you have no clue as to what they are going to do to the bike, nor do you have the ability to notice the difference between what you have, and what you changed to.
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Old 11-25-2012, 12:56 PM   #11
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

How much preload is on that Öhlins rear shock? Default is around 10-13mm.
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Old 11-25-2012, 12:58 PM   #12
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

It is a shorter spring, if that is what you are worried about.
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Old 11-25-2012, 01:06 PM   #13
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

Quote:
Originally Posted by Moto_Joe View Post
It is a shorter spring, if that is what you are worried about.
Looks short or lots of preload and I haven't seen short yellow Ö-springs.
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Old 11-25-2012, 01:08 PM   #14
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

There are a few different size springs for Ohlins. The are all shorter than OEM though. The TTX I think is 6" by 1.25" or so, the triple is wider, like 1.5" maybe? And the OEM spring is longer.

Hell look at the preload adjuster itself, It could not lengthen enough to fit that oem spring. the hydraulic adjuster will hit the top way before the spring were that long. It is not preload. The spring is just a lot shorter, by design
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Old 11-25-2012, 01:14 PM   #15
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

Quote:
Originally Posted by Moto_Joe View Post
There are a few different size springs for Ohlins. The are all shorter than OEM though. The TTX I think is 6" by 1.25" or so, the triple is wider, like 1.5" maybe? And the OEM spring is longer.

Hell look at the preload adjuster itself, It could not lengthen enough to fit that oem spring. the hydraulic adjuster will hit the top way before the spring were that long. It is not preload. The spring is just a lot shorter, by design
160mm is probably the sping's length for that.
edit. default preload is 10mm

7mm shorter shock with 160mm spring and 14mm preload.

Last edited by -JK750-; 11-25-2012 at 01:28 PM.
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Old 11-25-2012, 06:10 PM   #16
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Re: What difference will it make if I raise 7mm to rear shock. putting ohlins shock.

Now this is done i'd take the bike complete to a suspension place and have the suspension setup according to static/rider sag and riding style.

Since putting a newly rebuilt K4 750 shock into k2 750 i've noticed the front gets more of a twitch on powering off the B-road turns. That's ok though as it now steers laser fast and holds a tighter line which is what i want (i don't use steering damper).

Some places do the setup for free, my local place does that does alot of TT bikes.
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