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 Post subject: Re: Clutch slave bore trashed
PostPosted: Fri Jul 01, 2016 8:11 pm 
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Joined: Thu Nov 29, 2007 2:38 am
Posts: 253
Location: UK
model: 907 I.E.
year: 1990
I have just measured both and I can confirm 26mm bore for the cover/sleeve and 25.95 (or thereabouts) for the piston.
the bore is definitively 26mm

My new cover (the OEM racinc version pre drilled) at the very bottom of the bore has a channel that goes all around connecting the two holes for the bleeder and the pump; the width is around 3-4mm and is aprox 0.5-1mm deep.

basically when you sleeve the cover there is no need of going to the bottom anyways as I think the piston does not get bown there and if it does it is only for few mm.

I think we are overthinking the whole issue, stick a sleve in, making sure the botton /holes are free, bore it to 26mm and assemble


Last edited by angelix on Fri Jul 01, 2016 8:25 pm, edited 2 times in total.

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 Post subject: Re: Clutch slave bore trashed
PostPosted: Fri Jul 01, 2016 8:21 pm 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
Posts: 4978
Location: southern Germany
model: 750 Paso
year: 1987
thank you! :thumbup:


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 Post subject: Re: Clutch slave bore trashed
PostPosted: Fri Jul 01, 2016 10:25 pm 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
Posts: 3167
Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
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thank you! :thumbup:


BIG +1

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 Post subject: Re: Clutch slave bore trashed
PostPosted: Sun Jul 03, 2016 12:55 am 
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paso grand pooh-bah
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Joined: Wed Jan 19, 2005 12:00 am
Posts: 674
Location: CNY, US
model: 750 Paso
year: 1988
angelix wrote:
I have just measured both and I can confirm 26mm bore for the cover/sleeve and 25.95 (or thereabouts) for the piston.
the bore is definitively 26mm

My new cover (the OEM racinc version pre drilled) at the very bottom of the bore has a channel that goes all around connecting the two holes for the bleeder and the pump; the width is around 3-4mm and is aprox 0.5-1mm deep.

basically when you sleeve the cover there is no need of going to the bottom anyways as I think the piston does not get bown there and if it does it is only for few mm.

I think we are overthinking the whole issue, stick a sleve in, making sure the botton /holes are free, bore it to 26mm and assemble


I like it. I agree the pin won't go down that far because either because 1) what's going to push it there? 2) there's a lot of fluid in the way and 3) there's a spring behind it as well.

I'd prefer not to go down to the bottom of the cylinder with the new bore, as well. Hopefully they could simply replace the bulk of the bore, up to the fluid channels, and leave that all be. It makes sense they wouldn't need to, too.

Thanks again for all your effort, Gerhard & angelix; I really appreciate the assistance & thoroughness. I plan to drop it off on Tuesday, so we'll see how it comes out!

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 Post subject: Re: Clutch slave bore trashed
PostPosted: Sat Oct 22, 2016 4:37 pm 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
Posts: 4978
Location: southern Germany
model: 750 Paso
year: 1987
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I plan to drop it off on Tuesday, so we'll see how it comes out!

so? :smoke:


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 Post subject: Re: Clutch slave bore trashed
PostPosted: Tue Nov 01, 2016 6:39 am 
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Joined: Fri Jul 24, 2015 11:21 am
Posts: 123
Location: Belgium
model: 750 Paso
year: 1989
Very curious if you sleeved the clutch slave bore.
Any pictures?
If mine would start leaking I certainly would consider this solution, so I'm very interested to know if it works ...... :phone:
Seems like a straight forward job.

Frank

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 Post subject: Re: Clutch slave bore trashed
PostPosted: Tue Feb 28, 2017 9:45 pm 
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Joined: Tue Jul 26, 2005 12:00 am
Posts: 13
Location: Leicestershire, UK
model: 750 Paso
year: 1989
A very late reply, but I've had 2 bearings go in the slave piston on my 750, the second in particular appears to have spun the piston and grooved the bore. I put a new piston in as an experiment but the clutch action was far from smooth, I assume as the piston was tilting and catching on the grooves. I asked Paul K at Ducati Technical Services at Wakefield, UK, about it, as I feared new covers are unobtainable but he agreed to resleeve the bore, this was quickly done and the clutch action has been smooth and predictable since. I would imagine the bore surface could be better than original. I've only done about 1000 miles since but all seems OK so far.

Martin


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 Post subject: Re: Clutch slave bore trashed
PostPosted: Mon Mar 06, 2017 7:45 pm 
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Joined: Fri Jul 24, 2015 11:21 am
Posts: 123
Location: Belgium
model: 750 Paso
year: 1989
Martin, do you have a picture of the resleeved clutch cover? What did it cost? Would like to have one of mine resleeved also ....

Frank

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Ducati Paso 750 - 1989
Suzuki SV1000S - 2008
Ducati Monster 796 abs - 2010


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