[kiwistrada]

Well after a few track days it looks like the next wad of cash is destined for a slipper clutch.
Anyone out there fitted one to theirs yet and have any recommendations?
Any feedback would be welcome.

 

[BostonDucati]

Well after a few track days it looks like the next wad of cash is destined for a slipper clutch.
Anyone out there fitted one to theirs yet and have any recommendations?
Any feedback would be welcome.

From what I hear the STM 48 tooth is a great slipper.

 

[Visitor Q]

STM gets my vote!

Jason

 

[kiwistrada]

I heard talk that the 1098's clutches have a slightly different mount than earlier models. Does anyone know if this is so?
Before all the dry clutches were interchangeable between models but no one seems to be listing clutches specifically for the 1098 so will a slipper listed for say a 999 fit a 1098?

 

[jamiemac]

Hi,

Just fitting a MPL slipper clutch as we speak... the old 999 slipper clutches can be made to fit with different plates, nut, springs e.t.c, but you'd be better off getting a slipper clutch designed for the 1098.

Jamie

 

[Scutty]

Slipper

I just fitted a Bucchi Ducati Performance slipper that was for a 999, the plates will be ok.

You will need the bigger washer from the Corsa though as the input shaft on the 1098 is bigger.

Good luck, I had a kin nightmare getting mine off. The Factory had used
Loctite on everything !!!!!!1

The spacer was the hardest to remove, I ended up replacing the oil seal.

Scutty

 

[NewDuc]

48T STM Evoluzione

Love mine!

Well after a few track days it looks like the next wad of cash is destined for a slipper clutch.
Anyone out there fitted one to theirs yet and have any recommendations?
Any feedback would be welcome.

 

[Tricky Tricolore]

I've been interested in a slipper but my local dealer put me off by saying that I would lose engine braking. But hey perhaps that's a good thing as the Duke does feel awkward on the throttle control. It's either on or off. You back the throttle off a little, the speed drops way to low and then you have to give it some gas again. Maybe it's just me as I'm used to Jap four control. It could be that the slipper bridges the gap between the twin and the four and is somewhere in between.

I know if I pull away with some grunt the stock clutch makes some kind of scraping noise momentarily. I think this may be some kind of torque control or slight slipper built into the stock clutch.....any comments?

Whist we are on the subject of slippers can anyone tell me the benefits of 48 tooth over 12 or vice versa and what the different angles available mean.

 

[NewDuc]

Here are my thoughts and/or knowledge

Hopefully I'm technically correct here:

a) You don't lose engine braking...you just don't lock up your wheel if you over-rev which is a very bad thing that you never want to do anyway.

b) If you're on or off and haven't changed your gearing to more aggressive, it's just the nature of the beast and you'll get used to it. Probably why we get numb hands at times, throttle needs to be cracked open.....

c) Not that much difference but 48T I believe is more durable than a 12T but more can chime in here.

d) Ramp angle determines the aggressiveness of the bite...35 is more mild than 45, meaning that a 45 ramp angle is more aggressive and will allow less slipping of the clutch and thus is more "race-oriented" and advanced.

I've been interested in a slipper but my local dealer put me off by saying that I would lose engine braking. But hey perhaps that's a good thing as the Duke does feel awkward on the throttle control. It's either on or off. You back the throttle off a little, the speed drops way to low and then you have to give it some gas again. Maybe it's just me as I'm used to Jap four control. It could be that the slipper bridges the gap between the twin and the four and is somewhere in between.

I know if I pull away with some grunt the stock clutch makes some kind of scraping noise momentarily. I think this may be some kind of torque control or slight slipper built into the stock clutch.....any comments?

Whist we are on the subject of slippers can anyone tell me the benefits of 48 tooth over 12 or vice versa and what the different angles available mean.

 

[mrinflux]

clutch bark

If I pull away with some grunt the stock clutch makes some kind of scraping noise momentarily. I think this may be some kind of torque control or slight slipper built into the stock clutch.....any comments?

TT,

That scraping noise you're hearing is typical of new Ducati dry clutches. It's not "torque control or slight slipper built into the stock clutch." This clutch bark will disappear As you put some miles on the clutch and get more used to the action of the dry clutch.

Elton

 

[enziof]

Slipper Clutch Operation

The slipper clutch is designed to prevent rear wheel lockup when down shifting in the event you don't get the synchronizing blip of the throttle quite right. I did not notice any loss of engine braking. With the powerful brakes you have on the 1098 you don't use engine braking anyway.

 

[Mifune]

Correction

Hopefully I'm technically correct here:
...
d) Ramp angle determines the aggressiveness of the bite...35 is more mild than 45, meaning that a 45 ramp angle is more aggressive and will allow less slipping of the clutch and thus is more "race-oriented" and advanced.

A steeper ramp angle (45 degree) will retain greater engine braking and give the impression of releasing more gradually (slipping less) than a shallower one (35 degree) and is therefore the usual choice for the street.

 

[NewDuc]

Okay thanks!

But why would greater engine braking and slipping less be better for the street? (Wouldn't you want more slip for the street?) And lastly, is the ramp angle purely a matter of performance or preference too?

A steeper ramp angle (45 degree) will retain greater engine braking give the impression of releasing more gradually (slipping less) than a shallower one (35 degree) and is therefore the usual choice for the street.

 

[SHIFT-TECH]

Check out the slipper clutch from Sutter Racing out of Switzerland, a complete package incl. all tools that you need to install it and it works wonders, had an STM before and I like the Sutter much better. They are not cheap but you realy get what you pay for. Even has 3 adjustments so once you plates start to wear you just click through the adjustments.

 

[mrinflux]

slip sliding away

Why would greater engine braking and slipping less be better for the street? (Wouldn't you want more slip for the street?)

Roadrunner,

A slipper clutch "slips" when you release the clutch in a gear too low for the tire speed at the moment of clutch release. This slipping action prevents the rear wheel from locking up and skidding. The more slip, the sooner the rider can dump the clutch when downshifting.

Watch Stoner or Rossi slow down from 200MPH to 60MPH in preparation for entering a hairpin turn. They use no engine braking. Monobloc disc brakes are much stronger than engine braking and therefore stop the bike much quicker. So instead of downshifting one gear at a time, employing engine braking along the way, (like we do on the street), motogp racers grab as much front brake as they can while simultaneously downshifting from 6th to 1st gear, without stopping at any gears in between.

So, on the track you want as much slip as possible so you can dump the clutch as quickly as possible when downshifting without having to stop at any gears along the way. 6th to 1st baby, with no stops in between! That's how they be in motogp! Additionally, since no engine braking is employed, it's of no consequence.

In contrast, on the street, where we tend to downshift one gear at a time, employing engine braking along the way, we want engine braking and need less slip.

Elton

 

[aaronn]

i have the 48t stm on my bike and i love it

 

[NewDuc]

No idea

where the Roadrunner nickname came from...but I'll go with it. (Thought you were mistaking me for someone else when you posted it before)

Thanks, that further educated me on the slippee clutch...will keep it in mind on my upcoming track day too there sizzletits.....

Roadrunner,

A slipper clutch "slips" when you release the clutch in a gear too low for the tire speed at the moment of clutch release. This slipping action prevents the rear wheel from locking up and skidding. The more slip, the sooner the rider can dump the clutch when downshifting.

Watch Stoner or Rossi slow down from 200MPH to 60MPH in preparation for entering a hairpin turn. They use no engine braking. Monobloc disc brakes are much stronger, (and therefore, much quicker), than engine braking and stop the bike much quicker. So instead of downshifting one gear at a time, employing engine braking along the way, (like we do on the street), motogp racers grab as much front brake as they can while simultaneously downshifting from 6th to 1st gear, without stopping at any gears in between.

So, on the track you want as much slip as possible so you can dump the clutch as quickly as possible when downshifting without having to stop at any gears along the way. 6th to 1st baby, with no stops in between! That's how they be in motogp! Additionally, since no engine braking is employed, it's of no consequence.

In contrast, on the street, where we tend to downshift one gear at a time, employing engine braking along the way, we want engine braking and need less slip.

Elton

 

[SDDUC]

Any relation to Frank Rizzo! lol!

 

[mrinflux]

If he catches you, you're through!

No idea where the Roadrunner nickname came from...but I'll go with it.

Roadrunner,

No mistake. Your nickname comes from your claim, earlier today, in the "pressure plate opinions" thread, that you'd run anybody off the road who installed gold bolts, (I assume you meant captors), on their clutch pressure plate.

And then, about a half hour later, you posted a "Motion 1098" thread with a link to a super-blinged 1098 that had gold captors!

Elton

 

[BostonDucati]

Roadrunner,

No mistake. Your nickname comes from your claim, earlier today, in the "pressure plate opinions" thread, that you'd run anybody off the road who installed gold bolts, (I assume you meant captors), on their clutch pressure plate.

And then, about a half hour later, you posted a "Motion 1098" thread with a link to a super-blinged 1098 that had gold captors!

Elton

Actually the whole roadrunner thing is pretty stupid and even though you are not talking to me some how it annoys the shit out of me. As a matter of fact and I quote NewDuc said "No offense to anyone here, but if you get gold bolts I will run you off the road next time WE ride!" he wasn't even talking to you. He was talking to me. Since NewDuc is my friend he can say whatever the hell he wants to me.

Not to mention you try to give him shit about posting up the "Motion 1098" because it has GOLD retainers. Lol not only can you not read who a sentence is being addressed too, but apparently you need your sight checked because those retainers are titamium or silver.