Rave for the STM Slave!

[Brainfry]

Just finished the install... went with the 30mm bore. Night and day on the clutch action. So far no issues... quick/clean shifts, no trouble finding neutral and gratitude from my left hand. Thanks again Motostrano.

Later,

B

[GHEZZI]

No wonder, youv'e got three lard arsed bimmers in the shed. That's enough room for six Ducati's and a dance floor.

[Brainfry]

Tell me about it. It looks like a used bike lot in there. Next time I buy a house, I'm starting with the size of the garage. 4+

b

[HYPRmoTARD]

The STM slave rocks even with pazzo short levers. Better go with the 4 plus I run out of room in a 28x50 with 4 10ft doors OR just cut back on the cars which is my next step-damn cages.

[AXE]

I have the MPL and like it alot too! I am running the Pazzo shorties and they are great with the light pull.

Out!

[infidel]

I've got the pazzo shorties and stock clutch setup. It's not that bad for regular riding, doing a track day this weekend so will see how tired the hand is then.

[Brainfry]

For me it wasn't so much an issue of my hand getting tired (though the OEM slave DOES take more of an effort) it was more about quicker, more positive, smoother and easier shifts... especially on the track. I think if you do enough track days or ride more "spirited" on the street, you'd benefit from the advantages of an after market slave cylinder. I'm not certain, but I think the STM slave engages a BIT sooner than the OEM as well. Though that could be in my head as mechanically there shouldn't be a difference, right? Incidentally, I'm running the Pazzo shorties on my Hyper and it makes a huge difference.

Let us know how it goes...

B

[infidel]

Will do. Really looking forward to it. Haven't had the hyper on the track yet

[lelenb]

Originally Posted by Brainfry

For me it wasn't so much an issue of my hand getting tired (though the OEM slave DOES take more of an effort) it was more about quicker, more positive, smoother and easier shifts... especially on the track. I think if you do enough track days or ride more "spirited" on the street, you'd benefit from the advantages of an after market slave cylinder. I'm not certain, but I think the STM slave engages a BIT sooner than the OEM as well. Though that could be in my head as mechanically there shouldn't be a difference, right? Incidentally, I'm running the Pazzo shorties on my Hyper and it makes a huge difference.

Let us know how it goes...

B

There is a difference because of the larger diameter piston the aftermarket slave cylinders don't push the actuator rod as far when you pull in the clutch there fore it does not have as far to return.

With the stock clutch lever and clutch springs the Hyper's clutch was pretty light. I installed the shorty Pazzo levers and it was a bit firm but not bad. I then installed Speedymoto stainless springs with my open cover and damn that is a heavy clutch. An aftermarket slave cylinder is high on my list of must do's.

[08hyper]

Originally Posted by lelenb

There is a difference because of the larger diameter piston the aftermarket slave cylinders don't push the actuator rod as far when you pull in the clutch there fore it does not have as far to return.

With the stock clutch lever and clutch springs the Hyper's clutch was pretty light. I installed the shorty Pazzo levers and it was a bit firm but not bad. I then installed Speedymoto stainless springs with my open cover and damn that is a heavy clutch. An aftermarket slave cylinder is high on my list of must do's.

What lelenb said is true, the bigger piston in the slave cylinder will move a
"shorter" distance given the same amount of fluid from the clutch lever
when you pull it in, thus giving a "lighter" pull, and because the clutch pack
does not separate as far as stock, the clutch will engage a little sooner.

The reason the factory does not install the 30mm slave is because of the
MFG tolerences in the clutch plates, to give a little extra "clearance" so the
clutch acts right on production bikes.

There are companies that have 32mm slave cylinders for a even lighter pull,
but then the clutch stack height has to be "PERFECT" for it to work right, because
there will be no extra clearance, and can result in hard to find neturals, and
notchey shifting.

I have seen many bikes with the shortie clutch levers and the stock slave,
and for me making the clutch too stiff, I think they will be better off to run
the 30mm slave with the short levers, or go with the longer levers

IMHO, Aloha Alex