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Old 04-17-2011, 03:23 PM   #1
randomwalk101
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gsxr600 shock on ninja 250

I swapped out the stock 08 ninja 250 shock for the 2009 GSXR-600 shock. The 2008 ninja shock's spring is rated at 9.3 kg/mm and the stock GSX spring is at 9.4 kg/mm (according to RaceTech.com). The spring rate is basically identical. How is it the GSX shock when installed on the ninja, I feel so hard while going over bump etc. should I set the rebounce/compression all the way to soft?
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Old 04-17-2011, 09:47 PM   #2
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The preload may need to be adjusted for your weight as well. I'd also look into setting the rebound and compression like you stated.

What do you weigh? I'd think that a Ninja 250 would weigh less than the GSX-R 600, right?

One last thing, did you torque the shock and linkage to the correct specs? Did you do this with the weight of the bike on the rear tire, also?

Some things to check out, good luck!
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Old 04-17-2011, 10:17 PM   #3
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I adjusted preload to give about 35mm. I weight about 170 lbs.
When installing, I might have over torqued it (used impact gun). Does it matter?
Thanks for your input.
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Old 04-18-2011, 02:25 AM   #4
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Might have some good info here:http://faq.ninja250.org/wiki/GSXR600_shock

Other suspension mods are a good read also: http://faq.ninja250.org/wiki/Rear_suspension_upgrades
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Old 04-18-2011, 08:45 AM   #5
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thanks..I read those and yes, I did drill/grind and all that to make it fit. However it doesn't mention about the harhness of the shock and how to fix that though..
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Old 04-18-2011, 09:18 AM   #6
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Quote:
Originally Posted by randomwalk101 View Post
I adjusted preload to give about 35mm. I weight about 170 lbs.
When installing, I might have over torqued it (used impact gun). Does it matter?
Thanks for your input.
I never use an impact gun when doing ANYTHING to a bike. Maybe to loosen some nuts but thats never happened.

Any time you you see race teams working on bikes, you dont see impact guns.

They use them at factories but they are precision ones calibrated to the correct torque for that screw.

Impact guns are an easy way to ruin bike parts.
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tejano? Rape me
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Old 04-18-2011, 10:11 AM   #7
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I'll loosen the bolt up and retorque it. Any idea what the correct torque should be? I'll put some red locktite on it just in case too Thanks.
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Old 04-18-2011, 10:26 AM   #8
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I would take it to a suspension guy and have him set it up correctly. It will save you time and headache.
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Old 04-18-2011, 10:37 AM   #9
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Yup..will bring it to Motorcycles Unlimited...only thing is I live on the opposite side of town and don't have much time. Will try to mess with the compression & rebounce to soften it up..hopefully...until I can bring it in.
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Old 04-18-2011, 12:12 PM   #10
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If you torque it too tight, the sispension will bind, or might not move at all, giving it a harsher ride.

I'd torque it to spec, and go from there.
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Old 04-18-2011, 01:29 PM   #11
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Thanks Stang...will correct it and take it out for a spin to test. I think I over torqued it thinking I don't want the nut to fall off and the suspension dropped out on me ... LOL..
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Old 04-18-2011, 03:09 PM   #12
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Quote:
Originally Posted by randomwalk101 View Post
Yup..will bring it to Motorcycles Unlimited...only thing is I live on the opposite side of town and don't have much time. Will try to mess with the compression & rebounce to soften it up..hopefully...until I can bring it in.
Where do you live?
Back both knobs out all the way. Then adjust the compression (the bottom screw) to where you can push down and bounce the bike and it takes around 1 sec to return without over travel. Then go ride and start turning the compression in one click at a time until it feels too firm, and go back a click or two.
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Old 04-18-2011, 03:21 PM   #13
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Quote:
Originally Posted by texlurch View Post
Where do you live?
Back both knobs out all the way. Then adjust the compression (the bottom screw) to where you can push down and bounce the bike and it takes around 1 sec to return without over travel. Then go ride and start turning the compression in one click at a time until it feels too firm, and go back a click or two.
Thanks for the advice..will try it.
I'm in the SW part of Houston.
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Old 04-18-2011, 03:26 PM   #14
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ok, if you need any help I am off 290 and BW8
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