Clutch master rebuild kit ???

jerry · 27-08-2024, 10:01 AM

1991 750ss coffin style clutch master cylinder seal not sealing properly so I need a rebuild kit for one .. any ideas ????

its just pumping air when i try to bleed the clutch

stopintime · 27-08-2024, 10:02 PM

Brand new around £100. Better and a lot easier.

Darren69 · 28-08-2024, 02:34 AM

Ducati Paddy has kits for PS13 integral res m.c. part no 10436270 £25.45

jerry · 29-08-2024, 09:53 AM

Ye Darren I ordered one yesterday thanks ,, but now the main piston is seized too and its not very old either ,, Airline not shifting it either ,,

Darren69 · 29-08-2024, 12:53 PM

I've got a goldline PS13 from S4 up for grabs if you want one? They are better than coffin type.

jerry · 31-08-2024, 08:47 AM

The problem is the seized slave in the case ,, its not moving ,, thats what blew the master seal ,, i cant get the slave out of the case, so far tried high pressure air and heat ,,but its in solid ????

It was replaced with a new one not long before the bike came off the road for rebuild,,,

Mr Gazza · 31-08-2024, 10:12 AM

Could you drill and tap it for a slide hammer or extractor?

I thought you were going to machine the bore out and make a bigger piston, or am I thinking of someone else?

Beggars belief how it can seize with oil both sides of it!

jerry · 31-08-2024, 05:10 PM

Its hardly used and they are £150 if I can order one,, last one took 3 months from Italy and that was from Moto rapido ,, i have spent too much money on this bike already its now upsetting me ,,It looks great but ???

and the Monster 750 still cant get it on the bench to try and get the Neutral switch out ??

and My daughter Ninja 650 which I have been riding now has a broken Clutch cable and There are none available in UK Kawasaki are the most expensive for spare but never have any stock , Phoned 9 dealers and some after market suppliers M$P , wemoto etc apparently its a 3 to 6 month wait for Kawasaki Parts !!!!!!!!!!!

, I have one coming from Holland and another from Thailand where they have plenty in the Kawasaki dealers
Also thailand price £9.40 genuine kawasaki , Holland £21,30 +£5 post UK price £44.95

Im tired , of it all

Darren69 · 31-08-2024, 08:41 PM

https://www.ebay.co.uk/itm/196535918...mis&media=COPY

Not mine btw

jerry · 31-08-2024, 11:39 PM

Quote:

Originally Posted by Darren69

https://www.ebay.co.uk/itm/196535918...mis&media=COPY

Not mine btw

That ebay item is completely different to the one on my 1991 750ss ,, its not same layout or screw pattern ??? and mine is a 2 piece one ,,,

Darren69 · 01-09-2024, 12:03 AM

Is it the earlier dry clutch version?

jerry · 02-09-2024, 01:09 PM

yes it is early dry clutch

Darren69 · 02-09-2024, 06:12 PM

Gonna be hard to find SS parts bc 1 year only model but Paso and Cagiva Allazura use the same cover iirc. Maybe Pantah and 750 Sport/F1 too but rare. Stein Dinse I think have pistons for about 75 quid.

jerry · 04-09-2024, 06:04 PM

OK got the slave out the case undamaged but the seal is buggered going to need a new seal its like a big Oring has to be stretched on to the piston and needs to be compatible with Brake fluid ,,

measurements are Oring ID 20.mm
Thickness of oring 4.3mm
OD of oring 28.6 mm

actual piston bore 26mm The Oring seals by compression cant be a lip seal as it has to roll onto piston into groove and needs to be soft material

I believe its Ducati part Number 88640091A same as later 600, 750 engines with wet clutch in right hand case ,, the piston is same .

.

27-08-2024, 10:01 AM	#1
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	Clutch master rebuild kit ??? 1991 750ss coffin style clutch master cylinder seal not sealing properly so I need a rebuild kit for one .. any ideas ???? its just pumping air when i try to bleed the clutch __________________ MONSTERMAN

28-08-2024, 02:34 AM	#3
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	Ducati Paddy has kits for PS13 integral res m.c. part no 10436270 £25.45 __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

29-08-2024, 09:53 AM	#4
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	Ye Darren I ordered one yesterday thanks ,, but now the main piston is seized too and its not very old either ,, Airline not shifting it either ,, __________________ MONSTERMAN

29-08-2024, 12:53 PM	#5
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	I've got a goldline PS13 from S4 up for grabs if you want one? They are better than coffin type. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

31-08-2024, 08:47 AM	#6
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	The problem is the seized slave in the case ,, its not moving ,, thats what blew the master seal ,, i cant get the slave out of the case, so far tried high pressure air and heat ,,but its in solid ???? It was replaced with a new one not long before the bike came off the road for rebuild,,, __________________ MONSTERMAN

27-08-2024, 10:02 PM	#2
stopintime Registered User Join Date: Dec 2010 Location: Oslo Bike: S2r Posts: 453	Brand new around £100. Better and a lot easier.

31-08-2024, 10:12 AM	#7
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,985	Could you drill and tap it for a slide hammer or extractor? I thought you were going to machine the bore out and make a bigger piston, or am I thinking of someone else? Beggars belief how it can seize with oil both sides of it! __________________

31-08-2024, 05:10 PM	#8
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	Its hardly used and they are £150 if I can order one,, last one took 3 months from Italy and that was from Moto rapido ,, i have spent too much money on this bike already its now upsetting me ,,It looks great but ??? and the Monster 750 still cant get it on the bench to try and get the Neutral switch out ?? and My daughter Ninja 650 which I have been riding now has a broken Clutch cable and There are none available in UK Kawasaki are the most expensive for spare but never have any stock , Phoned 9 dealers and some after market suppliers M$P , wemoto etc apparently its a 3 to 6 month wait for Kawasaki Parts !!!!!!!!!!! , I have one coming from Holland and another from Thailand where they have plenty in the Kawasaki dealers Also thailand price £9.40 genuine kawasaki , Holland £21,30 +£5 post UK price £44.95 Im tired , of it all __________________ MONSTERMAN Last edited by jerry; 31-08-2024 at 05:12 PM..

31-08-2024, 08:41 PM	#9
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	https://www.ebay.co.uk/itm/196535918...mis&media=COPY Not mine btw __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

01-09-2024, 12:03 AM	#11
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	Is it the earlier dry clutch version? __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

02-09-2024, 01:09 PM	#12
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	yes it is early dry clutch __________________ MONSTERMAN

02-09-2024, 06:12 PM	#13
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,095	Gonna be hard to find SS parts bc 1 year only model but Paso and Cagiva Allazura use the same cover iirc. Maybe Pantah and 750 Sport/F1 too but rare. Stein Dinse I think have pistons for about 75 quid. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

04-09-2024, 06:04 PM	#14
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,911	OK got the slave out the case undamaged but the seal is buggered going to need a new seal its like a big Oring has to be stretched on to the piston and needs to be compatible with Brake fluid ,, measurements are Oring ID 20.mm Thickness of oring 4.3mm OD of oring 28.6 mm actual piston bore 26mm The Oring seals by compression cant be a lip seal as it has to roll onto piston into groove and needs to be soft material I believe its Ducati part Number 88640091A same as later 600, 750 engines with wet clutch in right hand case ,, the piston is same . . __________________ MONSTERMAN Last edited by jerry; 04-09-2024 at 06:17 PM..