Gen 4: 2011-2015 Dragracers respond only please. Is the judder spring needed? - Kawasaki ZX-10R.net
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post #1 of 6 Old 08-25-2017, 04:50 PM Thread Starter
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Dragracers respond only please. Is the judder spring needed?

Been dragracing for going on six years now and have been thinking about clutch set up. The Judder spring is only used for the slipper clutch set up so by locking up the slipper clutch with the eliminator washer thing is there a need for the judder spring?
Has anyone removed it and raced with it?

2005 ZX-10R Akrapovic Ti Evo 2 w/CF LOR can, PC3 with custom map, Factory Pro velocity stacks

2009 ZX-10r Full Gen4 Brock's SS exhaust with CF 14" can, PC3, Secondary Butterflies Removed, Kawasaki Race Exhaust Cam, My Own TRE, Degreed Cams 109/108

2011 zx10r Lower'd 2" Frt & Rear, Stretched 8", Graves CF slipon, GUHL Flashed ECU
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post #2 of 6 Old 08-25-2017, 08:04 PM
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Judder spring is used as a shock absorber for the clutch plates, slipper clutch has nothing to do with it, they have 2 different jobs.
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post #3 of 6 Old 08-26-2017, 09:15 AM
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Ive tried both with and without and my bike leaves smoother with the judder in.

Sent from my SCH-I545 using Tapatalk
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05 ZX-10R SWB.
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post #4 of 6 Old 08-26-2017, 10:04 PM
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what they said.

Also I use 1 less fiber plate and use 3 hard and 3 soft springs..........set the stack height to spec.

It makes fore a nice clutch to modulate.IMO

2004 ZX10R-few mods here and there......
and even made more Evil by Woolich.
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post #5 of 6 Old 08-27-2017, 10:20 AM
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Since the topic is "clutch" , what is the purpose of the piece we have called a "spring steel" ? The one that looks like two metal plates, riveted together.

I know a company named "FCC Japan" makes all of these clutches. Yam, Kaw, Honda, HD, MV Agusta, etc.....

But, Kawasaki appears to be the only one who uses the "spring steel" and I wondered why? Is it in any way related to the "judder spring"?

Piece "13089" on this 2004 zx10 diagram

2004 Kawasaki NINJA ZX-10R (ZX1000-C1) Clutch | Babbitts Kawasaki Partshouse
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post #6 of 6 Old 09-01-2017, 10:28 PM
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It cushions and smooths the clutch engagement.


Helibars, MRA screen, Ohlins damper, reversed shift pattern, sorted suspension, braided lines, Michelin Pilot Power, all else stock 'coz it's fast enough!
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