Clutch pull

that's the one, I had a stainless steel piston made to replace the worn out original.

About time for an update I'd say.

if you recall the last email I got from Oberon indicated they wouldn't be able to say anything until March.

Asked the other day and got the following info:

- Material has been acquired to make a Slave Cylinder for the Moto Guzzi
- Initial design will be in testing shortly, may proceed to full release if no massive issues are detected.

they've suggested if you're interested in getting one to use their newsletter, as it sounds like I'll need to wait for an official release notification to get a date out of them.


Good news frankly. I'm planning on doing the Swingarm bearings for my GRiSO soon, so I think I might hold off and do this at the same time.

thats great news, I'd be in the market for one, for sure

What about CLU-1400? This is a Norton part, but the three mounting holes look similar and it got a stepped cylinder from the factory.

It's true that the CLU-1400 has a stepped cylinder. However, if you compare that to the modified cylinder Johnny had to use (page 3) you'll see that it's still too wide and too short.

I haven't had any update from Oberon since that last email. I will send them another contact this week as I was under the impression that it would have been available for purchase now.

I noticed Oberon has the Moto Guzzi Clutch Slave Cylinder in stock now.
Any experiences?

So it is!

Not in a position to get it at present. Looking at a potential engine rebuild on my hands, but if I'm lucky enough for it to not be that then I'll be getting this and giving it a go.

Can someone post a link for me? I'd like to experiment.

Here you go Pete. . .

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Thanks, I'd just found it anyway. It doesn't mention anything in the blurb about reduced pull. Do we know if it uses a larger piston than the stocker?

Looks like it.

Last image shows the piston and it's almost the exact same as Paul's prototype. Larger diameter piston stepped down to fit.

I'm in!

Hello, hopefully I can help here, I have one of the first production slave cylinders, waiting to fit to my Stelvio. The piston is indeed stepped, 29.56mm at the base, stepped down to 24.95mm. Will try to include a photo if somebody tells me how ?.

Sounds like the dream answer to the long running clutch pull pain threads.  @Musto easiest way for pics.. make sure the pic is stored in a file on your laptop/device, just click the host an image button above [You must be registered and logged in to see this image.]

& select the image from the file , send it & insert it into your reply.....

I'm looking forward to experiences!
I noticed my clutch reservoir cap looks a bit affected by the fluid and was considering an RCS as an upgrade in comfort but a new cap and the Oberon makes more sense. And the brake cilinder needs to be replaced as well for the looks which is more than I'm keen on to spend now but comfort is highly valued IMO.

I'm amazed in the color choices! I wouldn't do a standard color since it's an upgrade I may vote for gold anodised. Mine is out for rollerisation and like to have this sorted first before proceeding...

Brembo RCS16 for the clutch works perfectly fine once adjusted - even with the 17 years old stock slave cylinder. As a result I got so much adjustability from the master cylinder that I have no real need for an Oberon slave. Best of all: My brother just surprised me with a RCS19 brake master for Christmas ...

looks like a well crafted part for very decent money

musto wrote:

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Looks good. Would be nice to get a comparison between fittings. Have you got a luggage scale or something to measure the pull+maintain weight of the old cylinder vs this one?

Yes that's the plan, measure before and after, but basically if it feels lighter it will do me. Unfortunately it will be a month or two before I get to it, but I will post my results when I do.

Important to remember that this may not work for people with small hands or who have very 'Dog-legged' levers.

I have a pair of dog-leg 'Shorties', (Which I hate, but I've been too lazy to swap out ) and I'm pretty sure the clutch one wouldn't work with a bigger slave.

Possibly right Pete.
The trade-off is less clutch lift per mm of lever movement.

However I was willing to bet that if you design a clutch to work with new slightly hairy plates then when they are bedded in there is more than enough clearance.

The clutch on mine was noticeably lighter with the 30mm "command piston" and no hint of drag.

I think that the Paul Brice stylee more efficient brembo master cylinder has a wider bore so that will restore your lift (as well as reducing contamination of the master reservoir)

Problem is a bigger master will, once again, change the ratio for the worse and increase the pull.

I'm remembering, (With my increasingly dodgy memory.) that my original 2008 clutch suffered, even when the lever pushrod was adjusted very accurately, from insufficient lift if I had the span adjuster set anywhere other than its furthest out position. Anywhere else and gear changes were compromised or sometimes, if I was in a hurry, impossible to achieve cleanly. Set in close the clutch would drag when hot making it impossible to select neutral at a standstill and making the bike 'Creep' if unbraked.

Now when I swapped the Sport gearbox in a couple of years ago I also installed the later Cali 14 clutch. This in itself is a bit lighter due to changes to the diaphragm spring but it's also interesting to note that the span sensitive clutch wonkiness disappeared after the fitment.

What does that mean? Who knows really? But it's something to be aware of........

This is an exiting idea.
Looking forward to seeing how they work on the bikes and how involved the
fitting process is.
Most of the upgrades I have in mind involve taking the bike off the road which I'm loathe to do at the moment. I'm hoping that this one would be done in a day. As mentioned the cost is not prohibitive and
it should be easy enuogh to revert to the standard set up if it didn't work out. Please correct me if I'm wrong