Slipper Clutch Aftermarket opinions - ZX6R Forum
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post #1 of 18 Old 01-21-2017, 04:39 PM Thread Starter
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Slipper Clutch Aftermarket opinions

I have always used a Yoyodyne slipper clutch on my bikes I was wondering if anyone has use an STM or Henderson or something else that they feel did a better job. I know the 09-12 ZX6R comes with a slipper in it stock but from what I have read is good for street but not that great on the track. I am not the kinda of person that really likes to relay on "oem performance parts" I maybe wrong but It's never as good as the aftermarket stuff. Just looking for some opinions and rear experiences with what people have and use.

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post #2 of 18 Old 01-21-2017, 05:25 PM
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post #3 of 18 Old 01-21-2017, 05:47 PM
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My '09 has an STM, however it came with it when I got it so I can't compare how it feels relative to the OEM one. It's a completely different design/concept though that uses 2 springs, a primary and secondary. One basically controls the force applied on the plates, and the other controls engine braking. Mine had a pretty soft secondary spring so there was very little engine braking available, but never had to worry about rear tire breaking loose. Personally I didn't like that and wanted a bit more engine braking and quicker engagement when I got back on the gas, so I got a new stiffer spring. I think I went with the highest rate they make. Now it's awesome! Just how I like it!

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post #4 of 18 Old 01-22-2017, 07:23 AM
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Quote:
Originally Posted by sbk1198 View Post
My '09 has an STM, however it came with it when I got it so I can't compare how it feels relative to the OEM one. It's a completely different design/concept though that uses 2 springs, a primary and secondary. One basically controls the force applied on the plates, and the other controls engine braking. Mine had a pretty soft secondary spring so there was very little engine braking available, but never had to worry about rear tire breaking loose. Personally I didn't like that and wanted a bit more engine braking and quicker engagement when I got back on the gas, so I got a new stiffer spring. I think I went with the highest rate they make. Now it's awesome! Just how I like it!
That's a lot of oil changes to switch out the spring isn't it?

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post #5 of 18 Old 01-22-2017, 07:25 AM
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That's a lot of oil changes to switch out the spring isn't it?
No...I'm not following. Why would you have to change the oil a lot? I changed it once when I changed the spring.

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post #6 of 18 Old 01-22-2017, 07:02 PM
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FWIW I loved the Yoyo that I had in my last race bike. The only downside is that you really need to pay attention to the stack height.
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post #7 of 18 Old 01-22-2017, 07:29 PM
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I'll start by saying I don't really know much about this . . . I just remember in the zx6r racing manual there are instructions in how to adjust the amount of back-torque on the OEM clutch by changing the clutch plate thickness and leaf spring. Might help to play with that if you don't like the feel of the stock clutch.
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post #8 of 18 Old 01-22-2017, 07:43 PM
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FWIW I loved the Yoyo that I had in my last race bike. The only downside is that you really need to pay attention to the stack height.
Yep, found that out the hard way! Wouldn't have thought that about 1 mm loss on the total stack height would make the difference between running normal and slipping the clutch in 4th, 5th and 6th gear!

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post #9 of 18 Old 01-23-2017, 02:07 PM Thread Starter
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Yea I remember it being a pain in the ass setting the yoyo at first with my cbr but worked flawlessly. I remember reading you can adjust the stock one but have always heard aftermarket one works better on the track. I guess I am really going to have to ride it to see if what I should do. I know the one that was in my buddies 06 636 didn't seem to do shit for me.

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post #10 of 18 Old 01-23-2017, 02:17 PM
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Originally Posted by whatisabutt4 View Post
Yea I remember it being a pain in the ass setting the yoyo at first with my cbr but worked flawlessly. I remember reading you can adjust the stock one but have always heard aftermarket one works better on the track. I guess I am really going to have to ride it to see if what I should do. I know the one that was in my buddies 06 636 didn't seem to do shit for me.
The OEM 'slipper' works well for an OEM but there is absolutely no comparison between this and a 'real' slipper. I can still lock up the rear wheel with the OEM slipper which is pretty much impossible with an aftermarket unit. Going into turn 1 at my local track was literally pull in the clutch, bang 2 downshifts, let the clutch lever out like a hand grenade. No drama, ever.
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post #11 of 18 Old 01-24-2017, 04:19 PM Thread Starter
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That's what I figured. I am keeping my eye open for a used one but probably have to buy a new one.

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post #12 of 18 Old 01-24-2017, 04:33 PM
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That's what I figured. I am keeping my eye open for a used one but probably have to buy a new one.
This one's at a pretty good price.
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post #13 of 18 Old 01-24-2017, 08:20 PM
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My OEM has alwas worked great!

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post #14 of 18 Old 01-26-2017, 01:31 PM
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Cool picture of an OEM 07 zx6r clutch exposing the ramp

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post #15 of 18 Old 01-27-2017, 07:43 AM
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Originally Posted by jd41 View Post
Cool picture of an OEM 07 zx6r clutch exposing the ramp

That is a cool shot!

I guess I should actually get off my butt and do some work on my bike as I have been meaning to see if I can adjust the slip on that OEM clutch.
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