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Go Back   DCSportbikes.net > Sportbike Operation > Test and Tune

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Join Date: January 10, 2003
August 26, 2004, 03:30 PM

Hey can somebody please help. I got a used SV650 a few months ago, and it has a gsxr750 rear shock (not sure which year). This shock is just set way too soft. I wind up crushing my license plate everytime i go over a big speed bump or put down a stoppie. So How do I determine the proper "stiffness" and once I do that, how can I adjust it and what tool would I need? Thanks in advance, I cannot take it anymore.
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August 26, 2004, 03:51 PM

How much do you weigh?


'08 MARRC Expert Racer of the Year
2009 #3 Combined Overall Championship

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August 26, 2004, 03:58 PM

155lbs - I wanted to talk to you about stunting the SV too... how long of a wheelie do you have to roll before you have to worry about oil starvation on the 650?

Thanks man
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August 26, 2004, 04:16 PM

I think I have a stock shock for an SV650.


BECAUSE I GET OFF ON IT!
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August 26, 2004, 04:41 PM

I think the GSXR shock may be sprung too softly. Racetech shows the GSXR shock as 6.6kg/mm (368lb/in) I have either a 600 or 650lb/in spring on my Penske. I weigh about 150. A Kawasaki 636 shock will fit, but I've read about people saying it is too hard. Racetech lists it as 9.7 kg/mm (542lb/in).

For now crank up the preload to eliminate the sag. And set the compression damping as hard as it goes. Set the rebound damping on the soft side.

I did a lot of wheelies when I first got my SV. A couple were close to a 1/4 mile. I'd bring it up in 2nd and work my to 5th. Most were less than 1/8 mile. After 4 months and around 5,500 miles the crank bearings went all of a sudden. It was right after an oil change too, switched to synthetic. But, I was able to get it fixed under warranty. Since then I've only done a few and not more than 3rd gear.


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August 27, 2004, 08:25 AM

Thanks SV -

"For now crank up the preload to eliminate the sag. And set the compression damping as hard as it goes. Set the rebound damping on the soft side."

might you or someone else with the proper tools/knowledge be able to lend some assistance with this?


and thanks for the offer on the SV shock WKDBLD, but I think I will just try to adjust this one as best I can... I probably won't keep the SV all that long anyway, but it is definitely too soft to keep ignoring.
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