Missing hydraulic bump stop

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kerrin
Mariana
Posts: 33
Joined: Sat Oct 17, 2009 10:47 am

Missing hydraulic bump stop

Post by kerrin » Sat Apr 27, 2013 12:12 am

I'm refurbishing a set of 1980's 38mm Marzocci forks; unfortunately both legs are missing the hydraulic bump stops,also described as top hat bush. Does anyone know where I could buy a pair? Alternatively, could somebody give me the dimensions & material so that I could machine a pair up.
Thanks.
Kerrin
KERRIN

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Craig in France
Cagiva Elefant
Posts: 806
Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Missing hydraulic bump stop

Post by Craig in France » Sat Apr 27, 2013 7:54 am

kerrin wrote: ... hydraulic bump stops,also described as top hat bush.
Can you just identify on this drawing which part you're referring to, Kerrin?

Ta.

Image

kerrin
Mariana
Posts: 33
Joined: Sat Oct 17, 2009 10:47 am

Re: Missing hydraulic bump stop

Post by kerrin » Sat Apr 27, 2013 9:49 am

Hi Craig.
It's number 39. Those are pretty much the forks I have, but rumor has it mine originally came off a Norton rotary so I couln't be too sure of their vintage.
Kerrin
KERRIN

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Craig in France
Cagiva Elefant
Posts: 806
Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Missing hydraulic bump stop

Post by Craig in France » Sun Apr 28, 2013 3:32 am

(Blimey, that's a weird piece to be missing ... :shock: )

Err, mine are safely installed where they should be, so I can't tell you what the dims are ;) . To try and find a pair, try sending a pm to Steve Allen; or maybe someone like Wolfgang Haerter in Canada, or Ian Gowanloch in Oz. Which country are you in?

kerrin
Mariana
Posts: 33
Joined: Sat Oct 17, 2009 10:47 am

Re: Missing hydraulic bump stop

Post by kerrin » Sun Apr 28, 2013 4:12 am

Hi Craig.
I thought it was weird as well but the forks were in one piece & had obviously been used in that condition. A friend bought a container of rotary spares from the factory about 15 (?) years ago, kept all the Norton specific items & sold the generic brakes, suspension, etc. I believe that the factory used Marzocchi suspension on prototypes in the mid to late 80's so a development engineer probably threw my bump stops away 30 years ago. I live in the UK, next step is to contact Mdina Italia & Brancato.
Thanks for looking.
Kerrin
KERRIN

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Craig in France
Cagiva Elefant
Posts: 806
Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Missing hydraulic bump stop

Post by Craig in France » Sun Apr 28, 2013 5:38 am

kerrin wrote: ...next step is to contact Mdina Italia & Brancato.
Hi Kerrin,

Also try Maxtons. They do valve conversions on Marzocchis, so may be able to help.

And Keith Nairn at Laverda Scozia - he knows his stuff ...
http://www.laverdascozia.co.uk/

Ciao

Craig

kerrin
Mariana
Posts: 33
Joined: Sat Oct 17, 2009 10:47 am

Re: Missing hydraulic bump stop

Post by kerrin » Mon Apr 29, 2013 10:02 am

Hi Craig
I spoke to Keith Nairn today & he has a spare pair of top hat bushes. Very helpful & knowlegable, thank you for suggesting him.
Thank you
Kerrin
KERRIN

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Craig in France
Cagiva Elefant
Posts: 806
Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Missing hydraulic bump stop

Post by Craig in France » Tue Apr 30, 2013 12:17 am

Good - yeh, Keith's an old mucker and 'One of the Good Guys'. This is his SFC and my Corsa, one day in the hills above Breganze ...

Image

kerrin
Mariana
Posts: 33
Joined: Sat Oct 17, 2009 10:47 am

Re: Missing hydraulic bump stop

Post by kerrin » Tue Apr 30, 2013 12:38 pm

Absolutely beautiful!
Kerrin
KERRIN

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