Rear suspension unit

discussions specific to the 906 Paso
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Jorian
Posts: 24
Joined: Wed Sep 25, 2019 6:37 am
model: 906 Paso
year: 1989
Location: Australia

Rear suspension unit

Post by Jorian »

The spring/damper assembly needs attention. It leaks and looks generally distressed.
I see new replacements are not given away, so will likely get this one fixed.
There is a ball joint assembly top and bottom (Heim joint I'm told), that is a press fit in the damper ends.
The top one had moved over, to the extent that the damper was rubbing against the frame.
It looks, from the sketch in the parts book, that there should be distance pieces on either side of the Heim joints, all missing on the bike here.
Would I be correct in assuming that they are steel spacers, with two different outside diameters?
It looks like something like that would work, to help retain the joints in their proper central positions.
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JWilliam
Posts: 328
Joined: Wed Oct 06, 2004 12:00 am
model: 906 Paso
year: 1989
Location: Nottingham, UK

Re: Rear suspension unit

Post by JWilliam »

Don't be trying to work all this out yourself, find a local suspension specialist and drop it in for service. Motorcycle suspension is difficult to work on without the right tooling.
Ronald
Posts: 33
Joined: Sun Feb 14, 2016 11:56 am
model: 750 Paso
year: 1986
Location: Belgium

Re: Rear suspension unit

Post by Ronald »

Hi Jorian,

I agree with JWilliam. If you don't have proper tools (and the expertise!) for such an overhaul then leave it to a specialist. I've had my rear shock fully overhauled, see http://forums.ducatipaso.org/viewtopic.php?f=3&t=7937 for more details. Good luck!
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Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: Rear suspension unit

Post by Mc tool »

Huh , what a couple of soft cocks :D

Jorian ,you don't say what type of shock you have . Mine is a mazocchi duo shock. The only special tool needed is a spring compressor. There used to be kits available to rebuild the mazocchi and I'm sure Olin's did one ( there have been 2 stock shocks used Mazocchi and Olin's ). The rebuild ain't much more than cleaning ,replacing parts in the kit , and re-oiling/reassembly. The missing distance pieces don't need someone with a degree to replace either. Even shoving a few washers in there would do the job .......admittedly some nice spacers would look better than a bunch of washers but they would work . Apart from us lot eBay and Google are your friends too
I wish I was young again............Id be heaps smarter than last time
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higgy
paso grand pooh-bah
Posts: 3263
Joined: Tue Jul 29, 2008 9:50 pm
model: 906 Paso
year: 1990
Location: Hilltown,Pennsylvania
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Re: Rear suspension unit

Post by higgy »

Huh , what a couple of soft cocks :D

Really total wussies.
Sure I enjoy having all my teeth but with just a little care and forethought
Shocks are no more complicated than any other maintenance task.
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
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Jorian
Posts: 24
Joined: Wed Sep 25, 2019 6:37 am
model: 906 Paso
year: 1989
Location: Australia

Re: Rear suspension unit

Post by Jorian »

This one is a Marzocchi DuoShock too.
It was sent to a rebuilder with a good reputation, decision being the owner's.
They couldn't advise about the spacers, but I think I can see what's needed and will fire up the trusty lathe and make some.
Always good to get others' thoughts, so thanks fellas.
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JWilliam
Posts: 328
Joined: Wed Oct 06, 2004 12:00 am
model: 906 Paso
year: 1989
Location: Nottingham, UK

Re: Rear suspension unit

Post by JWilliam »

higgy wrote: Really total wussies.
Funny. Along with Ronald I suppose what I mean is if you have the right tools and can disassemble the shock, then go for it. If not then take it to the specialist - since bike parts are so minutely machined and delicate that one slip can result in a breakage or that its so marked up, a dealer will be all annoyed when you bring it in. Some shock units have to be heated up before stripping - not fun.
ps. I'm not angry.
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