a fool and his money...

SPROGO1 RemoveThis @AOL.COM wrote:

 > could you expain what the slipper clutch does?

It reduces the effects of engine braking when downshifting,
which reduces or eliminates rear wheel hop (which is a wee
bit disconcerting when entering a turn, since you're already
busy, probably). It reduces the chances of overrevving under
decelleration.

It also increases confidence in the wet.

See:

So how does a Ducati style slipper clutch work?

<a style='text-decoration: underline;' href="http://www.performancemotorcycleparts.com/tuning_pages/slipper_clutches.htm" target="_blank">http://www.performancemotorcycleparts.com/tuning_pages/slipper_clutches.htm</a><!-- ~MESSAGE_AFTER~ -->
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SPROGO1.RemoveThis@AOL.COM wrote:
 >
 > Michael Sierchio wrote:
  > > The neverending project bike, my 2003 749 came home with me
  > > today, w/new rearsets and an STM Evo 48-tooth slipper clutch.
  > > The latter item was expensive, but quite amazing -- including
  > > the tactile feedback in the lever when the slip mechanism is engaging
  > > on downshift. I'm pretty good at the brake/clutch/blip/shift
  > > procedure, but this skill may now be obsolete.
 >
 > mike,
 >
 > could you expain what the slipper clutch does?
 >
 > thanks,
 > steve r

Slips. When you release it on decel. If the rear tire speed is too great as
compared to the speed of the countershaft sprocket. Prevents locking the rear
tire.<!-- ~MESSAGE_AFTER~ -->
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In article <sYadnY3lkoOAW7rfRVn-jw DeleteThis @speakeasy.net>,
Michael Sierchio <kudzu-news DeleteThis @tenebras.com> wrote:
 >It reduces the effects of engine braking when downshifting,
 >which reduces or eliminates rear wheel hop (which is a wee
 >bit disconcerting when entering a turn, since you're already
 >busy, probably). It reduces the chances of overrevving under
 >decelleration.

The basic idea is a clutch with ramps, so if the wheel is turning more
force than the engine, the ramps open the clutch and effectively
disengage the clutch.

The one in the new Monster adds an additional trick: its a
"slipper/gripper" clutch: when the engine is putting more force, the
ramps close the clutch tighter, allowing the clutch to use lighter
springs (therefore a lighter level action) while stil being effective.

Bike has a good summary in the March issue.

 >
 >See:
 >
 >So how does a Ducati style slipper clutch work?
 >
 >http://www.performancemotorcycleparts.com/tuning_pages/slipper_clutches.htm


--
Nicholas C. Weaver. to reply email to "nweaver" at the domain
icsi.berkeley.edu<!-- ~MESSAGE_AFTER~ -->
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Nicholas Weaver wrote:

 > The basic idea is a clutch with ramps, so if the wheel is turning more
 > force than the engine, the ramps open the clutch and effectively
 > disengage the clutch.

Yes, but -- if your description were 100% correct, engine
braking would not be possible. There is some torque threshhold
at which the ramps begin to open, and the "feel" is determined
in large part by the selection of friction plates.

It's possible for downshifting to create the torque effect of
an engine with hundreds of HP, at least for a fraction of a
second. Certainly enough to cause the rear end to hop, shake,
rattle and sometimes roll (dep. on the the front end is now
doing).

Some of the MotoGP bikes have fly-by-wire shifting in which the
throttle is blipped to the precise matching speed. Not a bad
use for a computer, and our bikes already have computers....
The mechanical design of the STM Evo is a bit puzzling to me,
much messier than software Of course, Suzuki's 2003
season and their bike-with-computer-virus reassures me that
the fancy new red clutch under the cover is a good thing.

 > The one in the new Monster adds an additional trick: its a
 > "slipper/gripper" clutch: when the engine is putting more force, the
 > ramps close the clutch tighter, allowing the clutch to use lighter
 > springs (therefore a lighter level action) while stil being effective.

This must be the wet clutch in the 620 and 800? The
STM Evo slipper's spring feels much lighter than the stock.

 > Bike has a good summary in the March issue.

Is there an online link?<!-- ~MESSAGE_AFTER~ -->
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SPROGO1.DeleteThis@AOL.COM wrote:
 >
 >
 > could you expain what the slipper clutch does?
 >
 >


It holds your slippers out of reach of the family dog.<!-- ~MESSAGE_AFTER~ -->
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I probably shouldn't comment because I have never ridden a bike with a
slipper clutch but I always like to slam it into first from high revs, chirp
the tires, bounce the back a bit, it's fun and helps clear the intersections
of errant pedestrians.

ps Many thanks to the impropmtu stunters and karters yesterday at a certain
eastside parking lot--quite a show. I was the clown in a pick-up driving
thru the axle-deep puddles everywhere. I had to close the sunroof! And
keep an eye out for the guy who cut in a clear bubble in his top-box and
gives his little doggie a taste of the two-wheeled lifestyle. That was one
happy dog.
Later!
AC
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James Clark <clark35.at.attglobal.net DeleteThis @mousepotato.com> wrote:

 > SPROGO1 DeleteThis @AOL.COM wrote:
  > >
  > >
  > > could you expain what the slipper clutch does?
  > >
  > >
 >
 >
 > It holds your slippers out of reach of the family dog.


I thought it was what you call a pile of eggs laid by your slippers.

Charles

--
Charles Soto - Austin, TX *** 1999 GSF1200S, DoD No. "uno"

("Meepmeep" is "rr," as in Roadrunner, my ISP.)<!-- ~MESSAGE_AFTER~ -->
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Charles Soto wrote:
 > James Clark <clark35.at.attglobal.net.DeleteThis@mousepotato.com> wrote:
 >
 >
  >>SPROGO1@AOL.COM wrote:
  >>
   >>>
   >>>could you expain what the slipper clutch does?
   >>>
   >>>
  >>
  >>
  >>It holds your slippers out of reach of the family dog.
 >
 >
 >
 > I thought it was what you call a pile of eggs laid by your slippers.
 >
 > Charles
 >
Yust yolking, aren't you?

Rich, Urban Biker<!-- ~MESSAGE_AFTER~ -->
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