Rcs16 Or Rcs17 With Oberon Clutch Slave??

As the title says, what's the best size RCS clutch master cylinder when used with an Oberon clutch slave cylinder?

Anyone running an RCS master with an Oberon slave please chip in with how it is for you!

If you can't answer that do you know the size of the OEM Panigale clutch master cylinder piston size? There's so many numbers on the OEM m/c I don't know which, if any, refer to the piston size.

Not feeling this post's gonna get much love, c'mon - YOU can make a difference - it's time for change!!! :loudspeaker: :balloon:

:thumbsup:

 

Ah Bullitt mate that's some real love right there!:balloon:
Yes the Oberon unit is 29mm (I think the stock 999/1x98 slaves are 26mm iirc).

That makes sense regards the RCS19, as I understand it the larger the m/c piston the more force is required to activate it (because you are forcing more fluid through the same diameter hose in the same amount of time) but requires less lever travel for the same effect.

The opposite is also true, a smaller piston will require less effort but will require a longer 'pull stroke' (here we go...) to achieve the same amount fluid movement.

@Bullitt Where did you get the RCS16 recommendation from? Do you know what size your OEM clutch m/c is?

My concern is whether the RCS16 will disengage the clutch fully before the lever hits the clip on (or require most of the travel) vs the RCS17 increasing the pull force unnecessarily, given that I won't be able to return them once I've found this out I was hoping to order the 'best' size and be done.

Thank for your input!

 

Thanks, yeah I love the guys in parts at Moto Rapido - knowledgeable and friendly. Cheers for the input! RCS is adjustable to either 18(red) or 20(black) ratio settings.

That's great feedback - thank you!

Again thanks for the detail! Do you know what size your Beringer is?? Cheers!
FWIW The piston size of either clutch or brake master cylinders has a big difference on the feel and operation of whatever is being controlled (ie either brake or clutch) Smaller m/c master pistons will have a lighter-to-pull lever but will require a longer lever travel to achieve the same end force.

Thanks for the inputs so far guys - much appreciated! :trophy:

 

Fwiw this is next-to-useless response I received from Oberon this afternoon after asking whether a 16 or 17 would be better:

"Thank you for your email . If you are thinking about changing your master
cylinder ,obviously the 17mm will move more fluid and give you much more
tolerance and a better selection on your gears. But 16 or 17 will work .
Hope this will help .
Kind regards,
Dawn
Customer services"

"much more tolerance and a better selection on your gears" WTF!??

 

Yes, thank you! However I don't know the size of your m/c. Their website calls it a 'CR012', whether that means it's a 12mm piston I dunno? I tried to send an enquiry but the link to their contact page ended in 'You don't have permission to view this page'.

Feel, travel, light/heavy-ness, etc etc are related to the size of both the master and slave piston viewed as a system, it's the ratio between the two that determines 'how' it will perform.

I think the OEM Ducati clutch slave piston is 26mm, Oberon is 29mm.

 

Yeah I'm probably gonna do exactly that - get an RCS16. The 17 will require less travel, which I like, but at the expense of a heavier pull force.

Is your clutch fully disengaged some distance from the left grip and is the clutch easy to modulate say in heavy traffic?

 

Yeah but mine will only end up smashed/scraped soon anyway! Love those V4s!

 

Mate, that's really good to know - thank you for taking the time to write that

Yeah I think as long as the lever doesn't come back to the bar the total plate separation will probably always be the same or similar, it seems to then come down to how much hand force is required to get it and how easy the clutch is to modulate when required.

OK I'll bang in an order for a 16 and will get used to it anyway, thanks again for your help and to all the other contributors - cheers guys!

:checkeredflag::trophy:

 

I'll stick this here, see attached.

Copied from: Clutch Slave Cylinders - Avanti Race Parts - Ducati Parts and Accessories for Road and Race Motorcycles. Services for Ducati Motorcycles. Race prep, Paintwork, ECU Repairs, Anodising and more!

 

Looks like the 1x98 bikes have 15mm piston and 18mm lever ratio and the Panigale is 15/19:
Brembo OE Clutch Master Cylinder PR15/18 silver without reservoir w/lever.73 - OPPRACING Products
Brembo OE M/C PR15/19 silver Ducati 1199 Panigale - OPPRACING Products

So the OEM lever should be lighter than an RCS16 or RCS17. I've got a Panigale m/c here so will compare it to the RCS16 both with the 29mm Oberon and try and remember to update this thread...