[Solved] 2000 M750 slave clutch swap with later model

[minisid]

Hi,
My clutch have been leaking for the past few year. I decide to fix this this winter.

The design on the 2000 model is not very robust it is a cover 236.1.010.3A and the piston is inside with a seal that goes around the rod.
I decide to check the later model 195.4.003.1A that start in 2002 and is use on multiple Ducati bikes, and ebay have some on sale pretty cheap.
So far I did put the 2002 slave cylinder. It does fit the bike and the bolt pattern match but the rod does not reach the cylinder. So I try to put a shim in there to simulate the longer rob, big mistake   don't do it, the little s... is stuck in the clutch cylinder now  . SO before I spend more money I would like to ask a few question:

Did someone already try to swap the old clutch with the newer style?
Did you had to change the rob (305mm on the 2000 vs 314 on the 2002)?
Is there anything to do in the clutch pack?

FYI if you need to open that 3 square cover a 14mm shim stock and a adjustable wrench will work, I could not find the 20mm "XZN" wrench, look liek they stop at 18mm

Thank you for the support

[stopintime]

The earlier rods were different length, yes.

Aftermarket slave cylinder manufacturers usually supply a 'pill'/piece of rod to make their cylinders universal. Probably better with a longer rod.

[koko64]

Longer rod, spacer pill or I've heard of people using a ball bearing the correct size. Lube the contact point of the rod in the slave cylinder with a dab of anti seize or hi temp grease.

Be warned, I have seen four rod types/sizes.

[minisid]

thanks for your answers.

Did someone knows how much the travel the rob need to disengage the clutch?

With that knowledge I can check how much longer the rob need to be. (when fully extended the cylinder is less than a mm away from the rod)

[stopintime]

The wet clutches tend to engage when the lever is far out, so I suppose you can shorten the rod a little bit. The next question is why would you?

[koko64]

I looked at my spares and couldnt find a pill to measure. Someone here will.

[pmazdan9]

Pushrod lenght was changed by 10mm so you'll need 10mm spacer in the slave cylinder.

[Duck-Stew]

I remember people using 8mm ball bearings to take up the difference (although obviously that's an 80% solution)

[minisid]

Pushrod lenght was changed by 10mm so you'll need 10mm spacer in the slave cylinder.

I tried the spacer but it does not work, it does get stuck behind the seal thatsuppose to go around the rob 

[koko64]

This is a tricky situation now. You need a longer push rod or spacer. There is a chance that if nothing works the pressure plate bearing may have failed.

A Whitworth or AF size bolt head fitted the star cover. I had a tool made to open it. The bolt head was close to (edit)16.5mm hex. Take the part to a bolt shop to check. Know that the seals are generally not available, and Ducati say the part is not rebuildable like the old units, but some companies may have an odd size seal available. I'm in Australia, but your market is bigger.

[koko64]

20200302_085059 by Tony Kokonis, on Flickr

[pmazdan9]

I tried the spacer but it does not work, it does get stuck behind the seal thatsuppose to go around the rob 

Not sure what you mean really! Does it go over the pushrod and gets stuck on it? You need to find/fabricate a spacer that works, or get a longer pushrod. They are really cheap!

[minisid]

sorry for the delay to all of you I finally fix it.

So like you all say I need a longer rod. the 2001 is 305mm the 2002 rod is 314mm.
The spare did not work well for me, it got stuck behind a seal. I bough a used rod on ebay and it worked great.

We can close this issue 

[koko64]

 

[DuciD03]

… Wealth of info here on DMF; Im always amazed and gratefull when Ive had questions answered;

without the advise, whos to knows;

thanks to the guy that knew! 

Cheers! to all those who chip in.