Oberon Slave cylinder Review

moto · January 30, 2009, 03:03:44 PM

The new OBERON Clutch Slave Cylinder is a very nice piece. We replaced the STM slave cylinder for an Oberon on our 1098 project bike. It was a simple install. The lever effort was indentical to the 30mm STM (as in very easy), but it seemed easier to find neutral. It was easy to install. East to bleed. Finish is very good and understated. The slave cylinder uses a "U" ring seal, a dust seal and a sealed back to keep grime off the piston. The breather hole is positioned to keep gunk from working it's way into the slave cylinder.

The OBERON Clutch Slave Cylinder is available in red, titanium, black and gold

We tested this on our own bike for a month and really liked them so we brought in a large quantity of them.
They are in stock and on sale until the end of February for $129:
OBERON Clutch Slave Cylinder

-M

kimmer · April 05, 2011, 03:30:10 PM

I know its been awhile since this post, but I am a new Duc rider and was looking for a modification to reduce the clutch lever effort on my '07 S2R1000. Monsterparts recommended the Oberon unit. Do you think it will significantly reduce lever effort?

muskrat · April 05, 2011, 04:07:06 PM

speaking from experience..........yes, but don't expect it to be totally likely butter.

zarn02 · April 05, 2011, 04:17:10 PM

Quote from: kimmer on April 05, 2011, 03:30:10 PM
was looking for a modification to reduce the clutch lever effort on my '07 S2R1000.

You can also pull two springs from the clutch. Still enough spring force to keep everything engaged, and lighter clutch pull.

I ran my M900 like this for quite a while without any issues.

stopintime · April 05, 2011, 04:24:37 PM

I might as well ask here too....

Anyone heard of an aftermarket 26mm slave - for the 'old' wet clutch bikes?
(28mm doesn't actuate the clutch enough)

BTW which MW guy is that in the picture?

muskrat · April 05, 2011, 08:52:20 PM

Quote from: zarn02 on April 05, 2011, 04:17:10 PM
You can also pull two springs from the clutch. Still enough spring force to keep everything engaged, and lighter clutch pull.

I ran my M900 like this for quite a while without any issues.

ding ding ding. I did that too and it's now like butter on the 900

Roaduser · April 05, 2011, 10:55:49 PM

Quote from: stopintime on April 05, 2011, 04:24:37 PM
I might as well ask here too....

Anyone heard of an aftermarket 26mm slave - for the 'old' wet clutch bikes?
(28mm doesn't actuate the clutch enough)

BTW which MW guy is that in the picture?

hmmm, bellissimoto recommended and sold me a 28mm for my wet clutch bike. i haven't received it yet, i hope it works!!

geoffduc · April 06, 2011, 12:34:03 AM

I've recently installed an Oberon Slave cylinder on my streetfighter and was impressed with the quality and the fact that a bit of thought had gone into re-designing it in that they use an oil seal instead of relying on the normal o-ring.

stopintime · April 06, 2011, 01:45:58 AM

Quote from: Roaduser on April 05, 2011, 10:55:49 PM
hmmm, bellissimoto recommended and sold me a 28mm for my wet clutch bike. i haven't received it yet, i hope it works!!

If you have an aftermarket adjustable lever, it might work ok if you put it at the widest position, which for many isn't a good position.
28mm slave does not move the clutch enough - the result is either a slipping clutch (now or later) or hard-to-find-neutral dragging and wearing clutch.

Isn't your clutch light enough to operate? If so, I'd return it.

Roaduser · April 06, 2011, 01:54:07 AM

"I would recommend the EVR 28mm. anything larger and you may have problems. Make sure when you order that you request in the notes block the pushrod extension for the slave and your 10% discount (we refund you the 10% after you purchase)"

this was the recommendation given to me, so possibly the pushrod extension is what will make the difference.

stopintime · April 06, 2011, 02:01:16 AM

Quote from: Roaduser on April 06, 2011, 01:54:07 AM
"I would recommend the EVR 28mm. anything larger and you may have problems. Make sure when you order that you request in the notes block the pushrod extension for the slave and your 10% discount (we refund you the 10% after you purchase)"

this was the recommendation given to me, so possibly the pushrod extension is what will make the difference.

In other cases when the extension is included, it's to fit bikes with a short pushrod.
It's not an issue of the rod being too short, it's about the action you (don't) get from a 28mm slave.

Roaduser · April 06, 2011, 03:35:47 AM

hmmm. well i am also putting on 999 master cylinders at the same time, i havent checked the master bore size difference yet, but if its smaller it may help the situation, if its larger i may have an even bigger problem... i do also have adjustable levers but they are intended to give me options, not to be set at an extreme to cater for another issue. actually my profile pic shows my new setup dummied up in the lounge room. ill look into the master differences and then just have to try it and see what happens.

Cheers Clint

kimmer · April 06, 2011, 06:12:08 AM

I appreciate all the feedback. Removing springs from the clutch would help, but I don't want to modify the clutch if I can get away with a "bolt-on" solution. I am going to give the Oberon slave cylinder a try, possibly adding a lever to it as well.
If I can get some improvement on effort, I will be a happy camper. Thanks! I'll post how it works out.

stopintime · April 06, 2011, 07:18:16 AM

Quote from: Roaduser on April 06, 2011, 03:35:47 AM
hmmm. well i am also putting on 999 master cylinders at the same time, i havent checked the master bore size difference yet, but if its smaller it may help the situation, if its larger i may have an even bigger problem... i do also have adjustable levers but they are intended to give me options, not to be set at an extreme to cater for another issue. actually my profile pic shows my new setup dummied up in the lounge room. ill look into the master differences and then just have to try it and see what happens.

Cheers Clint

Larger master = more movement of the clutch
Larger slave = less movement of the clutch

So, a larger master will equal out the larger slave.
But... even though a 999 master is probably bigger bore or at least the same, it's not compareable because the lever ratio is different from the stock master.

I suggest you call Fred at YoYoDyne and get his view on this. He'll be able to clear this up... and if required sell you the right parts. Or MotoWheels - whose thread this is.

errazor · April 06, 2011, 08:10:41 AM

Quote from: kimmer on April 06, 2011, 06:12:08 AM
I appreciate all the feedback. Removing springs from the clutch would help, but I don't want to modify the clutch if I can get away with a "bolt-on" solution. I am going to give the Oberon slave cylinder a try, possibly adding a lever to it as well.
If I can get some improvement on effort, I will be a happy camper. Thanks! I'll post how it works out.

A bolt OFF solution is easier than a bolt on, cheaper to.

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Oberon Slave cylinder Review