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Slipper Clutch Question

Started by RavnMonster, January 19, 2009, 04:27:03 PM

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RavnMonster

I was considering a slipper clutch for my monster. I was wondering if by using a slipper clutch is there any braking on the engine at all? What I mean by that is when I down shift will i feel any resistance from the engine at all? I dont want it to totally be gone i like using the engine to slow me down when down shifting.
"The Marines I have seen around the world have the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps!"
-- Eleanor Roosevelt, First Lady of the United States, 1945

BellissiMoto

Quote from: RavnMonster on January 19, 2009, 04:27:03 PM
I was considering a slipper clutch for my monster. I was wondering if by using a slipper clutch is there any braking on the engine at all? What I mean by that is when I down shift will i feel any resistance from the engine at all? I dont want it to totally be gone i like using the engine to slow me down when down shifting.

Not to worry, their is still substantial engine breaking, its just safer, faster, better, etc with one than without one.

ruester007

I had a slipper on my S2R800 and it was alright, it took a little getting used to not having one on my S4Rs. you Just have to make a slight modification on your timing for braking etc.

2007 - S4RS - Full termi system, integrated front signals/mirrors, Cox Racing radiator/oil cooler guard, frame sliders, DP tank guard, tinted windscreen, Sergeant Seat, pressure plate, spring retention caps, RCM clutch cover (painted), tail chop, emission removed, reflector removal
IN PROCESS - Rizoma clip-ons, grips and ends, Sodium blasted wheels

Statler

Are you locking up the rear now even with good rev matching on downshifts?    I not it's bling rather than usefull.

You can ride pretty hard on road or track before chirping a rear with a good blip and skillfull downshift.

It's still buy a flounder a drink month

RavnMonster

I'm sure part of my problem is my lack of riding skills. I often lock up the rear wheel when I down shift and it scares the shit out of me, especially when going around a turn and the wheel kicks out. LOL.. 

I've only been riding for about a year now so i'm sure i have plenty to learn.
"The Marines I have seen around the world have the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps!"
-- Eleanor Roosevelt, First Lady of the United States, 1945

Monsterlover

Learn to rev match, you'll love it [thumbsup]

Read my last post in this thread --->>  http://penndesmo.org/index.php/topic,47.0.html

I post as 900rider.
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

hypurone

As stated by others, you can avoid most of your issues by throttle control/ability to match revs. BUT, that said, I still installed a slipper for those OH SHIT moments that catch you out.... Basically you would notice no difference in engine braking up to the point of wheel lockup. At which time the clutch will slip the plates eliminating the lockup. At this point engine braking goes south until the wheel regains momentum and traction.
'07 S4RS "Testatretta" (In the FASTER color)
I'm not totally useless, I can be used as a bad example!

moto

A Slipper clutches is like ABS for the drive train. One does not have to have one - but it does come in handy sometimes.
We all know how to downshift and blip the throttle, but it is nice to have a little back up if you missed timed a downshift or ended up needing to downshift more than you thought. The slipper comes in handy on steep downhill turns or whenever the rear wheel is slightly unweighted. Once you get used to a slipper clutch, you find you are coming out of the turns in the right gear everytime and you don't have those butt puckering moments anymore.

You don't have to spend an arm and a leg on a slipper. We have Italian made slippers complete with high quality Surflex friction plates starting at $999:
MW 7000 Slipper Clutch w/ Surflex plates 

-M
www.motowheels.com

96 M944
98 900SS FE
01 996R
02 MV Agusta F4 750
05 999R
06 SC1000
07 1098
08 M696

Monsterlover

$1000 is an arm and a leg to me!!

That's 3 track days and 2 or 3 new sets of tires!!
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

Triple J

Quote from: RavnMonster on January 20, 2009, 05:45:00 AM
I'm sure part of my problem is my lack of riding skills. I often lock up the rear wheel when I down shift and it scares the shit out of me, especially when going around a turn and the wheel kicks out. LOL.. 

I've only been riding for about a year now so i'm sure i have plenty to learn.

Don't downshift in corners. Get all that done before the corner. If you're in a high enough gear to lock up the rear, then you probably don't really need to downshift anyway. Duc twins have pretty good pull down low in the rev range.

My MTS has a dry clutch and it is pretty rare that I lock the rear on a downshift. Typically only when I'm riding hard and downshifting at higher rpms. It's more of a problem in the rain admittedly. After you get used to it it's actually fun!  [evil]

Slippers are nice (especially at the track), but not all that necessary. For the $1000 ( :o) you'll drop on a slipper you can get some good riding instruction via a couple instructed trackdays. That will be much more useful.


Capo

The design of the slipper modulates the amount of slip and you will still have engine braking.

I have said before, the slipper clutch is the best mod I have made, I have adapted my riding style to take full advantage of it.


Capo de tuti capi

Dannog

Quote from: Triple J on January 20, 2009, 11:20:47 AM
Don't downshift in corners. Get all that done before the corner. If you're in a high enough gear to lock up the rear, then you probably don't really need to downshift anyway. Duc twins have pretty good pull down low in the rev range.

Ditto Triple J comments, but you forgot to add 'learn to use the brakes!' The fastest way to corner is to stay on the gas and brake hard and late. All of the track day instructors will tell you this. If your on the road, then everything is just ratcheted back to the appropriate speed.

I learnt to drive as a kid in cars and trucks with shit brakes so you had to down shift and make use of the engine to slow the Vehicle. Brakes these days are so good you should learn to use them as the primary means to slow down.

You should only consider a slipper if you do heaps of trackdays as they just aren't worth the expense. Don't forget also that they require more maintenance and don't last as long. BTW you can't roll start your bike if your ever in trouble with battery.

Practice and get good at braking AND down shifting at the right time so that the wheel speed and revs are matched that way you won't lock up the rear. Good luck [thumbsup]

hypurone

Quote from: Dannog on January 20, 2009, 05:40:55 PM
>>snip<< You should only consider a slipper if you do heaps of trackdays as they just aren't worth the expense. Don't forget also that they require more maintenance and don't last as long. BTW you can't roll start your bike if your ever in trouble with battery. >>snip<<

I beg to differ a bit. There is a substantial amount of rotating mass to be shed here. I wasn't focusing on that part in my decision but lemme tell ya, big difference.  [thumbsup] Though I suppose you could just replace the basket/plate parts etc to shed the weight, but why?  ;D

Not sure about the "more maintenance and don't last as long" part either. There is no maintenance on a hydraulic clutch other than flushing the fluid (assuming you have a clutch in working order and not counting normal wear and tear). That has to happen on both types. More wear would all depend on how much you are "slippin" it as that would be the only time additional wear would take place. I have seen plenty of guys bake a non-slipper quicker, through poor application/use/abuse. My Z1000 came stock with a slipper that went the life of the bike (albeit that life was cut short at 20k  :'( )

Just my .02 on it...
'07 S4RS "Testatretta" (In the FASTER color)
I'm not totally useless, I can be used as a bad example!

jesse370

Quote from: moto on January 20, 2009, 10:00:03 AM
A Slipper clutches is like ABS for the drive train. One does not have to have one - but it does come in handy sometimes.
We all know how to downshift and blip the throttle, but it is nice to have a little back up if you missed timed a downshift or ended up needing to downshift more than you thought. The slipper comes in handy on steep downhill turns or whenever the rear wheel is slightly unweighted. Once you get used to a slipper clutch, you find you are coming out of the turns in the right gear everytime and you don't have those butt puckering moments anymore.

You don't have to spend an arm and a leg on a slipper. We have Italian made slippers complete with high quality Surflex friction plates starting at $999:
MW 7000 Slipper Clutch w/ Surflex plates 

-M

they do make a pretty fine slipper clutch. I love mine, but I got one cause it was something I was considering and my stocker was trashed....So I made the jump, other thing that is really nice is you also get a faster reving bike when its done because of the greatly reduced rotating mass.....
White S4Rs | Ducati Performance Chip | Termi's | Hyperpro side mount damper | Motowheels MW-7000 Slipper | Billet Clutch Cover |  Speedymoto Ti Spring Caps | Speedymoto Stainless Springs | STM Frame Plugs | Ducati Performance Seat | CRG Roll-A-Clicks

CowboyBeebop

I have one, and as stated before, its mainly insurance.  I still rev-matched, but incase I forget to, or for some other reason don't, its there to keep me safe.  Further, slippers are significantly lighter than stock, and they're quieter too.  Plus, the clutch pull is usually lighter.  So even if you're not riding hard enough or properly, there is still plenty of justifications for getting one.

But to answer your question, yes, there's still plenty of engine breaking.