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PostPosted: December 19, 2011, 10:15 am 
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Joined: December 14, 2011, 4:24 pm
Posts: 2
Do these shocks run a typically sized 2.5" spring or other common size that can be changed.
IE could someone call up Hypercoil or Eibach and order from their catalog and get the desired/required rate?


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PostPosted: January 2, 2013, 8:08 pm 
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Joined: May 15, 2007, 1:08 am
Posts: 60
Location: VA
Ok, had to add some "cents" in here! I've got several 2002--04 YZF-R1 shocks handy. Springs measured out at ~500 lb/in. Stroke as quoted throughout here has been inaccurate to my measurement. These particular shocks have 1.9" stroke to the bump stop. When removed, the shock has a total 2.75" stroke. In answer to an earlier question as to whether off the shelf springs can be put on them- I've found that 2.25 ID x 7" long Eibach's swap out just fine- I put 350 lb/in on the front of my MG Midget. Many rates to choose from, and if a motorcycle enthusiast buddy is to be believed, the stock shocks can be revalved to suit the springs.

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PostPosted: January 3, 2013, 11:54 pm 
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Joined: October 2, 2012, 11:24 pm
Posts: 176
Location: Winter Park / Orlando
Well let me "pile on" as well! It's an old link, but for those considering bike shocks...the more information, the better!

Three 7 owners in Orlando are using Suzuki GSX-R750 or GSX-R1000 rear shocks on the front of our cars with very good success. I'm still building my car and following similar construction techniques used by the other two guys. While I'm no expert on shocks, I can say that they work great around town in normal driving and have been excellent on the track. These specific shocks are gas/oil-damped and have easy & simple adjustments for rebound damping, spring preload as well as high-speed & low-speed compression damping.

I bought two very low mileage shocks on eBay recently for around $60 each. That's very cheap compared to what some people are spending for front shocks! I can adjust both shocks from full soft-ride to full track-ride in less than 30 seconds with a small screwdriver.

I'm using Jack's excellent front suspension kit (Kinetic Vehicles), and here are a few recebt pics:
Attachment:
Suzuki GSX-R1000 shock 1.jpg
Suzuki GSX-R1000 shock 1.jpg [ 199.91 KiB | Viewed 4267 times ]
Attachment:
Suzuki GSX-R1000 shock 2.jpg
Suzuki GSX-R1000 shock 2.jpg [ 199.02 KiB | Viewed 4267 times ]


-G
viewtopic.php?f=35&t=14227


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PostPosted: January 4, 2013, 8:39 pm 
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Joined: December 12, 2012, 8:21 am
Posts: 356
Location: Northesat CT
I'm new here, ... but I must say that those shcock mounts look like a bad idea.
(The ones just above my post)


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PostPosted: January 19, 2013, 12:35 am 
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Joined: July 13, 2012, 10:49 pm
Posts: 20
I take it those are the 09-11 model year shocks? I was looking at the 03-04 gsxr 1000 shocks as they (supposedly) have slightly more travel and was wondering how one would adapt the end on those style for a setup like the garmans? They have a clevis like end. Any idea what wheel rate you have thegarman? or motion ratio?
Also am I right in figuring that a coilover set up like that is falling rate? Sorry just now saw the link to your log. Time for some reading

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Build log >>> viewtopic.php?f=35&t=13858


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PostPosted: February 13, 2013, 7:31 pm 
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Joined: May 1, 2012, 9:43 am
Posts: 316
Location: Medicine Hat, Alberta, Canada
The 03-04 do have more travel than 09-11, but they also have a softer spring, so your motion ratio will probably eliminate any difference. I'm considering GSXR-1300 shocks since they have either 68mm or 72mm travel, and a 13.1kg/mm (730#/in) spring. They have the clevis type end as well, and I think mounting it will be the same type of bracket as an eye mount just with a narrower bracket. Also, rising or falling rate depends on the included angle between your LCA and shock. Generally as the shock gets shorter the included angle will get larger, giving you a rising rate unless I'm mistaken.


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PostPosted: June 24, 2013, 2:07 am 
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Joined: February 18, 2011, 3:02 am
Posts: 100
Instead of using sport bike shocks, has anyone tried dirt bike shocks? They seem to have a lower spring rate and a little more travel then sport bike shocks.



Edit:

04-05 Honda TRX450, about 15 inches eye to eye, around a 400lb spring, adjustable...

http://www.ebay.com/itm/honda-2004-2005 ... 1270689%26

02-05 Yamaha Raptor 660, 15inches in length, 300lb spring, adjustable.

http://www.ebay.com/itm/Raptor-660-Adju ... d4&vxp=mtr


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PostPosted: July 31, 2018, 3:23 am 
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Joined: April 19, 2018, 2:02 am
Posts: 18
2004 Honda CBR1000RR rear shock:

calculated spring rate 1000 lb/in (yellow spring)
length 12.3" (312mm)
stroke without bumper 2.25" (57mm)

collar step type preload adjuster
minimum preload .5"
max preload .9"

Initially I thought this shock might not allow enough droop with a 500lb preload. My installation ratio is about 4:1, but I didn't understand the squared factor, I think that will work in favor of more droop? After reading this thread, maybe that will work, I'll probably even have to back off that installation ratio.

What worries me a bit, is the .5" (500lb) preload and that it may not allow much droop. I'm used to RC cars and having adjustable droop stops (down mostly), is it typical to just use the shock (and bumpers) to limit suspension movement?


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