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Old November 23rd, 2021, 07:35 PM   #1
Vansaki
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Cush Dive Free Play

Is there any factory data on the limit of free play on the cush drive ? I seem to have around .25" of free play. Seems like way too much. I will be shimming the cush drive but was just wondering if there was any factory specs on this?

Thanks
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Old November 23rd, 2021, 07:42 PM   #2
Triple Jim
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The manual says "Replace the damper if it appears damaged or deteriorated." Not much of a spec.
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Old November 23rd, 2021, 07:51 PM   #3
Vansaki
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Nice... LOL

Thanks Jim
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Old November 24th, 2021, 07:03 AM   #4
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Shim it as much as you can and still get it together.

There doesn't need to be any "slack", just enough to get it assembled.

In case you haven't seen it - https://faq.ninja250.org/wiki/How_to...the_cush_drive

I've used ABS plastic.

Makes a big difference, especially in on/off/on throttle transitions. Much better.
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Old November 24th, 2021, 07:31 AM   #5
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Inner tube rubber comes to mind.
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Old November 24th, 2021, 09:48 AM   #6
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Quote:
Originally Posted by Triple Jim View Post
Inner tube rubber comes to mind.
I think I tried it once, and to my surprise - it worked its way out.
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Old November 24th, 2021, 10:06 AM   #7
Vansaki
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Thanks to all that replied. I will probably try some plastic.

Thanks
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Old November 25th, 2021, 07:34 PM   #8
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Beware that lots of info in FAQ is incomplete, outdated or just outright wrong.

In this case, it's partially incomplete. Rather than shimming all 12 spots, shim backside uncompressed rubbers. So when chain spins sprocket-carrier forward, it compresses normal unshimmed rubber cushions. Shims should only go on backside rubbers that's compressed much less when you let up throttle and use engine-braking. This results in much less pressure on shimmed stack and lots less squirming.
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