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post #1 of 24 (permalink) Old 12-31-2004, 11:22 AM Thread Starter
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Slipper Clutch

I know the main reason for getting one is to limit the back torque on down shifting, which Ive run into many times on the track, thus why Iam considering getting one..

But my question is this, will installing the slipper clutch make doing power wheelies or clutch wheelies harder to do ?


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post #2 of 24 (permalink) Old 01-01-2005, 10:03 AM Thread Starter
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post #3 of 24 (permalink) Old 01-01-2005, 02:12 PM
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I dont know but I doubt it...


Ah, the elusive balance point...the G-Spot of wheelies if you will.
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post #4 of 24 (permalink) Old 01-01-2005, 02:27 PM
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*****************************
I know the main reason for getting one is to limit the back torque on down shifting, which Ive run into many times on the track, thus why Iam considering getting one..

But my question is this, will installing the slipper clutch make doing power wheelies or clutch wheelies harder to do ?


thanks
*****************************

I would like to instal also STM slipper cluth but this is the reason I must think about it...

I dont have any experience but I suppose that there will be greater risk to flip up...normally the big engine and high compression ratio cause a large engine braking when shutting the throttle...same thing which is not good during hard front wheel braking and cause rear wheel bounching - but which is good if the FRONT wheel comes too up....

Last edited by Lespaul66; 01-02-2005 at 12:54 AM.
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post #5 of 24 (permalink) Old 01-01-2005, 02:33 PM
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Nope it wont...

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post #6 of 24 (permalink) Old 01-01-2005, 03:18 PM
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No. If you are on throttle it will act normal. When you get off the throttle and are still in gear it will engauge and allow the rear wheel and motor to spin on their own also allowing you to downshift with out touching the clutch. upon giving it gas it will let go and power the rear tire again as normal.

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post #7 of 24 (permalink) Old 01-02-2005, 12:57 AM
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yes

Yes... but how about the potential flip up problem as I described ???
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post #8 of 24 (permalink) Old 01-02-2005, 02:48 AM
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Re: yes

Quote:
Originally posted by Lespaul66
Yes... but how about the potential flip up problem as I described ???

This is a problem and I have first hand experience of this. I had a slipper clutch fitted when my bike was serviced and the garage also messed about with the fuelling. The end result was on my first ride after getting it back I wacked it up in first and due to the new fuel mapping the front jumped up really erratically I rolled of the throttle to bring the front down a little as I normally would but............................................... .........it kept rising and flipped me off backwards. I've now got used to the clutch and the fuelling problem has been fixed but it certainly makes wheelies harder. I now have to use the back brake more.

Now I've got a question here and I don't mean to hijack the thread but this sort of runs on from your question. How much back brake can you use if the front is coming up too fast before you lock the back wheel up? I am really paranoid about locking the back wheel on the brake whilst the front is in the air.
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post #9 of 24 (permalink) Old 01-02-2005, 09:59 AM
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Re: Re: yes

Quote:
Originally posted by Redrocket996
How much back brake can you use if the front is coming up too fast before you lock the back wheel up? I am really paranoid about locking the back wheel on the brake whilst the front is in the air.
Your front end would be long down already before that happen

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post #10 of 24 (permalink) Old 01-02-2005, 07:07 PM
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I installed a Yoyodyne slipper clutch........never noticed any difference in the front end being "harder" to bring up, or "pop" up unintentionally, feels the same.....but I have so much more entry speed going into turns with the confidence of not having the rear end getting squirrelly when down shifting. One of the best mods. I"ve ever done, to any bike I"ve had

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post #11 of 24 (permalink) Old 01-02-2005, 10:36 PM Thread Starter
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Thanks for all the response guys, Also my next question would have been what slipper clutch do you recommend, I see xfactor uses Yoyodyne, is there other brands that I can compare with..

Thanks again for the help
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post #12 of 24 (permalink) Old 01-02-2005, 11:14 PM
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I'm wondering about wear. How long will these clutches last before needing to be rebuild (new plates and fibers ect) My clutch has 16k on it and it works great.

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post #13 of 24 (permalink) Old 01-03-2005, 04:09 AM
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Well the whole idea about a slipper clutch is that when the rear wheel drives the engine, the clutch will either disengage completely, or slip some - depending on the "strength" of the engine braking. By strength I mean a high rpm/low gear compared to a low rpm/high gear. The first combo would be stronger engine braking.

So, the clutch is going to slip more. Fortunately, we have wet plate clutches. This means slipping a clutch won't burn it up like in a car (dry plate). Short answer: slightly more wear, but worth it if you want to ride on the track.

For those of you who don't understand exactly how a slipper clutch works, take a few minutes to search for a diagram. I could describe it, but without a diagram you won't really understand.

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post #14 of 24 (permalink) Old 01-03-2005, 04:31 AM
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Quote:
Originally posted by Looneybomber
I'm wondering about wear. How long will these clutches last before needing to be rebuild (new plates and fibers ect) My clutch has 16k on it and it works great.
My slipper clutch is a sigma clutch for a Ducati 996 and I was told to expect between 4000 and 6000 miles depending on how hard I used it.
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post #15 of 24 (permalink) Old 01-03-2005, 11:02 AM
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Ive been looking around the only ones I find are the STM, I Have 04 R1

I read on the forum someone mention JOS/Yoyodyne, but I cant find it anywhere for the R1

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post #16 of 24 (permalink) Old 01-03-2005, 11:11 AM
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Quote:
Originally posted by Redrocket996
My slipper clutch is a sigma clutch for a Ducati 996 and I was told to expect between 4000 and 6000 miles depending on how hard I used it.
that's it? 4-6K? I wonder if the STMs last longer? I know they do cost more.

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post #17 of 24 (permalink) Old 01-03-2005, 03:31 PM
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Quote:
Originally posted by thecraw-r1
Ive been looking around the only ones I find are the STM, I Have 04 R1

I read on the forum someone mention JOS/Yoyodyne, but I cant find it anywhere for the R1
call Fred at Yoyodyne, got mine for$795
http://www.yoyodyneti.com/default.aspx

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post #18 of 24 (permalink) Old 01-03-2005, 04:41 PM
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thanks

WSMC # 568

LP Carbon Fiber Frame Sliders/Clutch/Handlebar/Rear Spool, Custom Led Tailight, Rear peg brake LEDS, Greggs Flush mounts, Power Commander PC3 USB, BCM Air Filter, Zero Grav DB Dark Smoke Windscreen,Termignoni Carbon Cans TI Half System,Velocity Stacks,GYTR CF Lower Trim,GYTR CF Exhaust Shield,GYTR CF tailhugger/Chainguard,Ohlins Steering Dampner, Yoyodyne Slipper clutch,Galfer Stainless Steel brake lines Front/Rear, Afam 16 tooth sprocket, CRG Shift/Brake Short Levers, Custom Map, Ohlins YA-343 Rear shock, Ohlins R/T Forks, Marchesini Gold forged Mag wheels, DID erv3 520 Conversion, Veypor VR2 computer. Shark Race Skinz. Gilles quick chain adjusters, Barnett CF Clutch Kit, AIM MXL Pista Logger/Display
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post #19 of 24 (permalink) Old 01-03-2005, 09:41 PM
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Fred is a great guy and has a very experienced perspective on racing, and all things included.

Asked if he was afraid of dying in an accident, Marco Simoncelli responded: "No. You live more for five minutes going fast on a bike like that, than other people do in all of their life." rip #58 ciao ciao bello

the art of the moto: The Trench Plate Diaries
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post #20 of 24 (permalink) Old 07-28-2010, 07:54 PM
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slipper clutch wear

I've got just over 7k on my clutch and this is the third season I've been one wheelin' it. No sign of any slipping yet. Also, as far as flipping the bike back... I love the slipper clutch. When I get off the gas a little to bring it down, it lands on air. When I had my 2000 R1, it would slam down so hard I snapped the mount for my headlight assembly. A few times I thought I'd fractured the rim it landed so hard.

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