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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through February 22, 2009 » Slipper Clutch « Previous Next »

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Trojan
Posted on Wednesday, February 18, 2009 - 04:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If a company were to develop a very good slipper clutch to fit the XB range, how many people would be interested?

There has in the past been a couple of attempts at this but nothing that has been as good as available for Japanese sportsbikes. The Buell does have some unique features that make it more difficult to do, but we are currently in discussion with a major manufacturer/developer who supplies WSB teams. They are interested but are asking us to try and find out general interest in the product.

For those who don't know what a slipper clutch is, it is a clutch that allows some controlled slip when changing down the gearbox and avoids the rear wheel locking. They are now very common on sports bikes and almost a necessity for racing these days. The 1125 has a vacuum operated system that operates in a similar way, but this would be a mechanical 'ball & ramp' style slipper clutch that woudl fit into the stock clutch housing.
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Hooligan620
Posted on Wednesday, February 18, 2009 - 04:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If the price were right, I'd be interested.
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Diablobrian
Posted on Wednesday, February 18, 2009 - 05:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Sounds interesting to me.
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Rocketsprink
Posted on Wednesday, February 18, 2009 - 06:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

that's the big issue with most now I'm sure. Cost will be the number 1 factor. I'd love one for the race bike.
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Trojan
Posted on Wednesday, February 18, 2009 - 06:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Cost is likely to be in the region of GBP600 (US$840 approx) or slightly less.
Not cheap, but a 'pukka' piece of kit : )
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Fast1075
Posted on Wednesday, February 18, 2009 - 08:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Now THAT will be a useful tool.
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Slaughter
Posted on Wednesday, February 18, 2009 - 08:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

It would have to be cost-competitive with the slipper offered now by Buell for the XB (formerly the XBRR clutch) sells now for $1250 suggested retail.

If it uses the stock housing, how would you adjust the onset of slip - changing springs or adjust through the cover (as is now done with the stocker)... how about changes as pads wear?

Cool project and price looks competitive - though it seems most US riders are more interested in how their engine sounds than in how the bike actually RIDES.

Slipper is of more value than engine modifications.


(Message edited by slaughter on February 18, 2009)
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Ft_bstrd
Posted on Wednesday, February 18, 2009 - 09:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

$1250 is too much for me to invest in a slipper clutch.

Materially less than that would bring it into the realm of possibility.

I can to a lot of throttle blipping for $1250.
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Surveyor
Posted on Wednesday, February 18, 2009 - 09:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Count me in if the price is reasonable.
A slipper would be really useful on the track, particularly for us 'older gentlemen' who, being unused to still having brakes after lap three, rely more heavily on engine breaking.
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Trojan
Posted on Wednesday, February 18, 2009 - 11:45 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

It would have to be cost-competitive with the slipper offered now by Buell for the XB (formerly the XBRR clutch) sells now for $1250 suggested retail.


The XBRR clutch was made by STM if I remember correctly, and the ones we are looking at will be better quality.
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Js_buell
Posted on Wednesday, February 18, 2009 - 12:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

It will all depend on the price but I would deff be interested
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Ochoa0042
Posted on Wednesday, February 18, 2009 - 01:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

sounds interesting, and expensive.. I'll wait till Buell makes it stock on an XB for cost effectiveness

edit
wasnt there a dude that made his primary drive system belt fed with a dry clutch? that was a awesome modd!!!

(Message edited by ochoa0042 on February 18, 2009)
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Boltrider
Posted on Wednesday, February 18, 2009 - 01:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Slipper clutch would be great on the street too.
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Trojan
Posted on Thursday, February 19, 2009 - 04:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

wasnt there a dude that made his primary drive system belt fed with a dry clutch? that was a awesome modd!!!

That was us : ) We used a prototype Free Spirits belt drive primary on our 2006 race bike. It didn't use a slipper clutch at that time but a modified stock clutch.





The bigest advantage was much less weight and smoother shifting, although we had some problems with minor oil leaks throught he (sealed) bearings during the year.

A slipper clutch would certainly have been an advantage racing and would have cut lap times considerably if we could have got one at the time.
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Ochoa0042
Posted on Thursday, February 19, 2009 - 11:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

it seems as if the billet aluminum is really bulky.... how much weight savings was there with this modd?
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Trojan
Posted on Friday, February 20, 2009 - 07:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

it seems as if the billet aluminum is really bulky.... how much weight savings was there with this modd?

The billet alloy was far less bulky than it probably looks in the picture. I can't remember the exact weight saving but it was considerable. No primary case, no primary chain, lightweight front pulley all adds up to a big saving.
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Hogs
Posted on Friday, February 20, 2009 - 08:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Damn I like that setup let us know how much down the road..
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Froggy
Posted on Friday, February 20, 2009 - 11:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Trojan you forgot to mention how awesome it looks ; )
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Thesmaz
Posted on Friday, February 20, 2009 - 12:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Will it be similar to this one:
http://www.fat-cat.eu/buell-harley-parts/motorteil e/mb2c-antihoppingkupplung-buell.html

English translation
On the race track moving large V2 motors are down while not entirely unproblematic.

The huge amount of braking torque to act in duel situations requires much more routine and not always true

Timing of fast Einkuppeln.Diese Antihoppingclutch provides the first opportunity at any time herunterzuschalten

and then soft einzukuppeln fit if the adhesion fits. Very high quality and the Moto GP field proven

Components, of course, in light alloy construction. Available for all Sportster and Buell motorcycles.

Fits without modification.

WHY ANTI-hopping?:

Anti-hopping clutches prevent blocking of the rear wheel down.
The chassis is also fast and strong directional load cycles stable.
On the race track will be shorter lap time possible!

The driving is a little too much in clutch beachtettes topic area. It is precisely for "normal" driver ", the anti-hopping clutch greatly to prevent falls by the rear wheel slide on.
Even when accidental, untimely down separates the anti-hopping mechanism the force! This is about turning the Motores prevented.

In the street sports, Eduro Cross and Supermoto Sport makes this type of rear control for many years valuable assistance.
In the Supermoto and sports grounds at the rear wheel must Gaswegnehmen, and "in the curve is slowing down" side to break the curve correctly to another, on the other hand, the wheel does not completely block otherwise it erupts uncontrollably.
Experienced drivers do this fine with the hand on the clutch lever. But someday, the best driver error, and exactly at this moment waiting for the competition.
With the anti-hopping clutch as the driver, you have exactly the same delay on the rear and the wheel is not blocked but will remain in rotation. Through this well-calculated behavior will reduce the lap times and driving the increases.

The driver feels only a slight and temporary Vibriren by the pressure change in the clutch lever - the signal that the anti-hopping clutch works flawlessly.

When ordering please indicate the following:

Vehicle model for which purpose the coupling is required and the engine configuration (capacity, performance)
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