Gen 3 rear shock. - Kawasaki ZX-10R.net
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post #1 of 14 Old 03-01-2013, 08:24 AM Thread Starter
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Gen 3 rear shock.

Hello; Mike here. I am getting ready to replace the rear spring on my stock 08 shock with the 9.8 spring from Racetech which I have heard makes a big difference in handling performance. I have read where the ride height of the rear is 1/2 inch lower due to the spring being shorter. I understand that the spring is stiffer, so the bike will not sag as much when sat on, but I was wondering if anybody has added a spacer, or shim to the top shock mount to replace the lost ride height? Has anybody who did the mod measure their rear ride height when seated with the stock shock, and then with the new spring to see what the actual difference is? Any help would be greatly appreciated. Thanks. Mike.
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post #2 of 14 Old 03-02-2013, 08:12 AM
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I would also like to know this. Have you done any thing to the shock itself? What is your weight if you don't mind me asking? I am looking at options for my Gen 3
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post #3 of 14 Old 03-02-2013, 01:59 PM
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I just got my rear spring from racetech last week and they sell a 1/2" spacer as well to make up for the racetech spring being shorter then the stock spring. The spacer is an additional $19 but then it doesnt change the ride height.

I just installed it on my bike and the ride height is exactly the same but doesnt sag near as much.

Hope this helps
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post #4 of 14 Old 03-02-2013, 02:00 PM
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I was also told that having the rear shock revalved for the stiffeer spring isn't completely necessary for street riding. With the stiffer spring it is already going to be working far less then with the stock spring.
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post #5 of 14 Old 03-02-2013, 03:12 PM Thread Starter
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Chersh1088: Thanks for the reply. On the spacer that Racetech sells, is it a 1/2 inch spacer for the spring itself, or could you just space the shock at the top of the shock mount where it mounts to the frame with the long threaded bolt? Please let me know, and thanks again. Mike.
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post #6 of 14 Old 04-04-2013, 11:53 AM
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Can you change out the spring yourself and do you have to have a shop do it? I am thinking of being cheap on suspension and just doing a refresh and putting a new spring on the rear with Spacer.

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post #7 of 14 Old 04-04-2013, 12:03 PM
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So I went to Racetech and they have a spring wieght calculator. I weigh 185lbs without gear. It recommends:

Recommended Shock Spring Rate: 11.597 kg/mm (use closest available)
Stock Shock Spring Rate: 9.7 kg/mm (stock)

http://racetech.com/ProductSearch/2/...ZX-10R/2011-12

Does this seem right?

It says my front end is spot on!

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post #8 of 14 Old 04-04-2013, 08:43 PM
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This is what I have. Muzzy lowering link. It has a couple of adjustments and I have mine all the tallest. Rear end on my bike feels pretty tall with it. Stock rear shock though.
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post #9 of 14 Old 04-04-2013, 08:44 PM
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post #10 of 14 Old 04-04-2013, 09:47 PM
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If you have a lowering link, and set at highest setting you are at stock ride height.

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