RGS Clutch Master Cylinder Piston Size

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Terry Dymond

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G'day all,
Quick question, what is the standard diameter of an RGS' clutch master cylinder piston, my local supplier has 12mm and 15mm kits in stock, he says the 14mm kits are hard to source.
Thanks
Terry
 
Terry Dymond said:
G'day all,
Quick question, what is the standard diameter of an RGS' clutch master cylinder piston, my local supplier has 12mm and 15mm kits in stock, he says the 14mm kits are hard to source.
Thanks
Terry
Click to expand...
If you'd asked this a year ago, I could've helped.  That's when mine was apart. :'(
 
Thanks Cam, that's what I expected, bloody thing is leaking like a sieve, plus the clutch action isn't what it should be.
Already printed out a copy of Lothar's excellent 'how to' guide, thanks Lothar.

Terry
 
Make sure you order a PS15 front the same as the brake. PS15 rear brakes are different but still called PS15. :)
 
Terry Dymond said:
Already printed out a copy of Lothar's excellent 'how to' guide, thanks Lothar.

Terry
Click to expand...

glad it is of help :-)

Good luck with the repair. It's fairly easy if you know how to and have the right tools ... :-)
 
Terry,

Although the repair kits for both brake and clutch M/Cs are essentially identical, the correct clutch piston has a plastic insert at the end where the clutch lever bears on it.  This ensures smooth lever action without requiring excessive lubrication.

The clutch piston should not be used on the brake side, the plastic might give up at the most unconvenient time... :o

piet
 
Thanks one and all, will ring the Bike Factory here in Adelaide tomorrow.
R date is 31 October Blab, the day I become an old age pensioner or in naval talk, I've done my 65 :D
 
You'r lucky Terry
In the UK these kits will become imposable soon as Brembo have stopped supplying spare parts. PS15 and P08 owners beware.
 
Paddy said:
You'r lucky Terry
In the UK these kits will become imposable soon as Brembo have stopped supplying spare parts. PS15 and P08 owners beware.
Click to expand...

Readily available here, just drop me a PM with your requirements.

piet
 
Just a heads up on replacing the master cylinder piston: I installed the new piston in accordance with Lothar's instructions but found that when I tried to bleed the clutch the fluid would squirt up all over the place. Strange, never used to do that, also the lever travel was excessive before pressure came on the lever and the clutch disengaged.
After a bit of head and bum scratching, I wondered if the piston retaining ring and piston had been pushed all the way home. This turned out to be the case, managed to force the ring (and piston) in a further couple of millimetres and all is good now.

Just passing on a lesson learnt.
 
Thought I'd throw my two hapeth in here. I've fitted a matching pair of AP Lockheed Adjustable Ratio master cylinders to my jota when I fitted four pot callipers.
I can highly recommend them, they are much cheaper than the Brembo original, excellent quality and look very much in keeping with the bike.
 

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Bob, where did you get adjustable Lockheed master cylinders much cheaper than Brembos? In fact, where do you get them at all? I did a quick search and turned up precisely one on Pommy eBay, and it sure wasn't cheap  :o.

Ken
 
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