Downshifting with a slipper clutch. Several quick downshifts okay? - Page 3 - ZX6R Forum
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post #31 of 57 Old 04-18-2017, 06:47 PM
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Ive done a few track days, and I've down shifted more than one gear with one pull. I dont really get what the big deal is if your breaking with this action. . .
It's not that it doesn't work, or that it's wrong...the point is it's not the best way. At a slower pace, anything works more or less, but the guys that are winning races at expert club level or higher are not doing it that way.

Just like many other techniques used on track. Sure you don't have to tuck in behind the windshield, and can remain more upright. Sure you don't have to put the foot pegs under the balls of your feet rather than heels when you take a turn. Sure you don't have to scoot your butt over to one side on the seat when you turn. But if you're trying to go faster and faster, all those things matter and can make a big difference. Some methods really do work better than others even though nothing is really set in stone
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post #32 of 57 Old 04-20-2017, 07:06 PM Thread Starter
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Tried both methods on the street today with good results. Obviously there will be a huge difference in speed at next weeks track day where I'll finally start to use the slipper clutch. I can't wait.

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post #33 of 57 Old 04-21-2017, 06:46 AM
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Guess I'm in the minority here. I will take 2 downshifts at a time at CotA going into turn 1 and 12. Turn 12 is going from topping out 6th down into 1st gear and turn 1 is another fast turn and again puts me in first gear. I usually will skip the top 2 gears...meaning either 6>4>3>2>1 in turn 12 or 5>3>2>1 for turn 1. It's hard for me to pinpoint why I do it there and not some other tracks, but if I had to guess I would say it has to do with the huge difference in speed from the straight to initiating the turn. I have the OEM slipper. But I can't think of any other times at any other tracks that I do that.
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post #34 of 57 Old 04-22-2017, 05:26 PM Thread Starter
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I was looking up info on the 13+ zx6r slipper and it's different than the 07-12 which means it's no longer "race adjustable". The race kit manual has different specs to modify the slip which are not applicable to the 13+. So, again, no longer adjustable but has a much lighter pull effort.

Here's how the 13+ clutch looks





2013 Kawasaki Ninja ZX-6R First Ride - Motorcycle USA

The Ninja’s drivetrain also received some improvements in an effort to make it friendlier to ride on the highway. The big news is the fitment of a clutch sourced from Japanese company Fuji Chemical Company. The wet-style clutch is similar to the Ninja 300‘s and features a more simple design allowing for fewer mechanical parts and less weight (over 1.5 pounds lighter than the old unit). A cam system pushes the clutch plates together when the engine is loaded (acceleration) and apart during deceleration. This allows for fewer clutch springs (from six to three) and wispy, one finger light lever pull. While this facilitates a degree of back-torque limitation (rear wheel chatter) conversely it can no longer be deemed a true tune-able ‘race-style’ slipper clutch.


Here's a picture of the 07-12 zx6r (ramps visible, pretty steep too) which was fully adjustable.

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post #35 of 57 Old 04-25-2017, 07:08 AM
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Guess I'm in the minority here. I will take 2 downshifts at a time at CotA going into turn 1 and 12.
-Cody
Maybe in the minority here, but you're in good company.

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post #36 of 57 Old 04-25-2017, 07:25 AM
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Gave this a try yesterday. Instead of blipping or slowly releasing the clutch on the gsxr a few times I just dumped it, expecting something awful and got nothing of the sort. I hope the zx6r works this well
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post #37 of 57 Old 04-25-2017, 07:54 AM
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Can someone link me to the race manual?! lol I couldn't find it hahaha. 😂😂 I wanna check out this race adjustment to the clutch I've heard of it before just never looked into it lol

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post #38 of 57 Old 04-25-2017, 08:18 AM Thread Starter
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Originally Posted by Felixthecat View Post
Can someone link me to the race manual?! lol I couldn't find it hahaha. 😂😂 I wanna check out this race adjustment to the clutch I've heard of it before just never looked into it lol
Here you go dude: http://www.factorypro.com/manuals/Ka...Kit_Manual.pdf

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post #39 of 57 Old 04-25-2017, 08:47 AM
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Can someone link me to the race manual?! lol I couldn't find it hahaha. 😂😂 I wanna check out this race adjustment to the clutch I've heard of it before just never looked into it lol
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Damn dude...just when I was about to say "Didn't know there is a race manual, but I'm sure JD will come through with a link to one shortly if it does exist".....yeah, no disappointment there once again lol
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post #40 of 57 Old 04-25-2017, 08:53 AM Thread Starter
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Originally Posted by sbk1198 View Post
Damn dude...just when I was about to say "Didn't know there is a race manual, but I'm sure JD will come through with a link to one shortly if it does exist".....yeah, no disappointment there once again lol
Did that one on purpose just for you
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post #41 of 57 Old 04-25-2017, 06:05 PM
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JD always be coming in clutch!
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post #42 of 57 Old 04-25-2017, 10:36 PM
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I realise I'm not answering the question Ina technical level but…

I'm not racing on the street, so it's not as important. I enjoy downshifting properly and smoothly myself. Like most aids on bikes I'd sooner not use them so I'll just keep downshifting one at a time in quick succession without using the slipper unless I get it wrong, then it will help me out.


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post #43 of 57 Old 04-26-2017, 04:50 AM
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I am heading to the track this weekend and will try to get video of my personal clutch usage when downshifting.
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post #44 of 57 Old 04-28-2017, 05:01 PM Thread Starter
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Finally! The first track day of the year was today and was focused on clutch use/ improving technique all around.

I still prefer the throttle, albeit out of habit, but I also like my newfound stability provided by using clutch slip.

So I tried both methods of shifting gears/ slipper clutch use.

1) Changing 1 gear at a time while pulling the lever in a fast successive manner:
Worked quite nicely. I was able to brake later while maintaining a consistent and increased brake pressure going into corners which helped provide predictable corner entry stability. Absolutely no problems with the back end waving or loosing traction.

2) Downshifting multiple gears and dumping the clutch:
A bit sloppy with some fishtailing if not done with finesse primarily due to an extended clutch hold and drop in rpm's. It doesn't really work well with the OEM clutch unless you are able to make very fast downshifts, but probably missing a gear in the process. Maybe an aftermarket slipper would make it a smoother transition.

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post #45 of 57 Old 04-28-2017, 06:01 PM
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I agree, same experience last weekend. #2 doesn't work for me and just fucks everything up meaning I almost ran off the track.
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