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 Post subject: Rear suspension unit
PostPosted: Wed Nov 06, 2019 9:55 pm 
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Joined: Wed Sep 25, 2019 6:37 am
Posts: 14
Location: Australia
model: 906 Paso
year: 1989
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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 Post subject: Re: Rear suspension unit
PostPosted: Sat Nov 09, 2019 2:23 pm 
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Joined: Wed Oct 06, 2004 12:00 am
Posts: 322
Location: Nottingham, UK
model: 906 Paso
year: 1989
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.


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 Post subject: Re: Rear suspension unit
PostPosted: Fri Dec 06, 2019 11:25 am 
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Joined: Sun Feb 14, 2016 11:56 am
Posts: 30
Location: Belgium
model: 750 Paso
year: 1986
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 viewtopic.php?f=3&t=7937 for more details. Good luck!


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 Post subject: Re: Rear suspension unit
PostPosted: Sat Dec 07, 2019 6:02 am 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1692
Location: Newzealand
model: 906 Paso
year: 1990
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

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 Post subject: Re: Rear suspension unit
PostPosted: Sun Dec 08, 2019 1:25 am 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
Posts: 3213
Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
Quote:
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.

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 Post subject: Re: Rear suspension unit
PostPosted: Thu Dec 12, 2019 5:54 am 
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Joined: Wed Sep 25, 2019 6:37 am
Posts: 14
Location: Australia
model: 906 Paso
year: 1989
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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 Post subject: Re: Rear suspension unit
PostPosted: Sun Dec 29, 2019 11:59 pm 
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Joined: Wed Oct 06, 2004 12:00 am
Posts: 322
Location: Nottingham, UK
model: 906 Paso
year: 1989
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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