Ceriani 35mm fork springs manufacturer and/or shop

M

Matt888

New member
Location
Gent, Belgium
Hello all,

This is my first post on the forum, greetings from Belgium!
I've got a modified 750SF 1973.

I'm searching for replacement progressive springs in a Ceriani 35mm fork and can't find an immediate source.
Tried Hagon Shocks in the UK but they couldn't help me with Ceriani (they only had Marzocchi compatible springs).

Can anyone recommend a manufacturer and/or shop, preferably in Europe?

Thanks for your help!
Matt
 
Have you tried contacting Bevilacqua (Enzo) in Jemappes in case they have some lying around.
Do you want new or second hand springs?
Paul
 
Paul Marx said:
Have you tried contacting Bevilacqua (Enzo) in Jemappes in case they have some lying around.
Do you want new or second hand springs?
Paul
Click to expand...

I would prefer new ones if available.
I'll call Enzo to check, merci!
Matt
 
Ceriani alwas fitted linear springs in de 35 forks, so if you want progressive ones you better approach the Wilbers, Maxtons etc of this world.

Marnix
 
Many thanks Ernesto & Stephane!

I must admit I'm a bit confused now:

Wirth 480mm
Wirth 500mm
Race Tech 425mm x 26mm 0.80kg
Race Tech 425mm x 26mm 0.85kg

3 different lengths, which one to choose?
I guess I could take out the original ones, measure them and replace by the same length?

Could anyone enlighten me on the differences to expect using different spring lenghts?

Mainly road usage, Ceriani fork with drum brakes (no discs).

Many thanks,
Matt
 
MarnixSFC said:
Ceriani alwas fitted linear springs in de 35 forks, so if you want progressive ones you better approach the Wilbers, Maxtons etc of this world.

Marnix
Click to expand...

Thanks Marnix,
I've enquired @Maxtons as well, awaiting reply.
Matt
 
The overall length is not critical, most aftermarket springs these days use a spacer to set correct length for sag, just make sure they aren't too long. My Racetech in my SF are .90 or .95, can't remember, I think lighter will be too soft for the bikes weight. I doubt Maxton do progressive or dual rate, their stock in trade is performance. There has been lots of discussion on this forum on whether single rate (as original in my Cerianis) or prog/dual are the go. I am perfectly happy with single rate, but each to his own. Don't get springs from eBay please, there are numerous quality suppliers in Europe.
 
Tippie said:
The overall length is not critical, most aftermarket springs these days use a spacer to set correct length for sag, just make sure they aren't too long. My Racetech in my SF are .90 or .95, can't remember, I think lighter will be too soft for the bikes weight. I doubt Maxton do progressive or dual rate, their stock in trade is performance. There has been lots of discussion on this forum on whether single rate (as original in my Cerianis) or prog/dual are the go. I am perfectly happy with single rate, but each to his own. Don't get springs from eBay please, there are numerous quality suppliers in Europe.
Click to expand...

Thanks for your input Tippie,
I always prefer to buy from a manufacturer direct or through an official importer/dealer.
Cheers,
Matt
 
Tippie said:
The overall length is not critical, most aftermarket springs these days use a spacer to set correct length for sag, just make sure they aren't too long. My Racetech in my SF are .90 or .95, can't remember, I think lighter will be too soft for the bikes weight.
Click to expand...

Matt,
As Tippie quoted Race Tech supplies spacers with their spring kits.
And for your info I'm using .85kg RT springs on race track events (my weight is 72kg).
SFC Ceriani 35 disks front end though..
Cheers,
St?phane
 
Maxton replied with a very professional approach:



Thanks for your enquiry, we can help you out with your forks but have no spec sheet for you to read. 

We convert your forks, but not by modifying the existing internals.  We throw everything inside the fork away and start again with our internals.  The internals we supply is our own GP20 cartridge style damping system. The cartridge system is the same type of internal as what you would find in any modern front fork.  It has been manufactured and developed by our own engineers and has pistons and shim stacks for the rebound and compression damping.  The Cartridge also has needle valves so you can adjust the
damping.  The damping adjusters are external, so you can change the damping without having to strip the forks down, but we hide the adjusters to keep the classic appearance.  As part of the conversion we also machine new fork tops to take the new cartridges and damping adjusters.  We also fit new springs.

Every Maxton GP20 cartridge is built to order, the reason for this is to valve and spring the cartridges to suit the fork, the bike, the riders weight and what they are using the bike for.  Once the cartridge has been manufactured we then fit the cartridge to the fork to make sure it works correctly.  In most conversions we have to modify the original bottom sliders and stanchions so our cartridge will fit and work properly.  The forks are then returned to you fully serviced with new seals and the spring preload and damping set up.

The Maxton GP20 cartridge costs between ?405.00 and ?605.00 + V.A.T. Depending on how adjustable you want the cartridge to be.

- for ?405.00 + V.A.T the cartridge is adjustable for rebound damping.

- for ?605.00 + V.A.T the cartridge is adjustable for rebound and compression damping.

All adjustment can be made without having to strip the forks down.

To service the forks with new seals and install the cartridges costs ?155.00 + V.A.T.  In some cases there are also charges for any extra work to get the forks to work correctly.  In Norton and Seeley conversions we machine new bushes for both top and bottom sliders, the bushes are made from a hard wearing frictionless plastic called Delrin.  The bushes cost an extra ?80.00 + V.A.T.  In some cases we also have to get the original sliders honed as the bore of the slider is not machined very well.  The cost of honing the sliders is ?80.00 + V.A.T for the pair.  In some Triumph forks the seal is held in place with friction on the outside diameter.  We machine a groove in the bottom slider, so the seal is retained with a cir-clip.  This costs an extra ?50.00 + V.A.T.

The cartridge conversion fits inside most forks with stanchions that have an outside diameter of 35mm or bigger.  In some Honda forks the stanchions are 35mm outside diameter, but the internal diameter of the stanchion is too small for the cartridge to work.  For these forks we supply new Hard Chromed stanchions with a larger internal diameter.  These cost ?200.00 + V.A.T a
pair.

For more information and to view images of our products click on the following link :

https://www.maxtonsuspension.co.uk/files/products-road.htm

If you need any more information about the modification we carry out you can ring me on the telephone number above.

Regards

Richard

Maxton Engineering
Laurel Bank
Kingswood
Frodsham
Cheshire
WA6 6HX
TEL : 01928 740531 
EMAIL : info@maxtonsuspension.co.uk
WEB : www.maxtonsuspension.co.uk
 
Interesting paradox with upgrading old forks with new internals - essential for rivet counters, but a full upgrade to a cartridge will set you back about 2 or 3 times the cost of a set of the most up-to-date forks off a hyper sports bike from a wrecker. Even upgrading a modern cartridge fork to 'better' cartridge internals will cost a stack of centavos.

I understand that fitting a set of modern USD's to an SF0 or SF1 in orig state is absurd ... but just sayin' ....
 
Matt, why bugger rnd with all that nonsense?
Get em off the shelf at Dam Classic Racing. Got a pair for my 73/750 12 months ago, money well spent  ;)
You know it makes sense !
Hooksey.
 
Putting a lot of money in a fork obviously depends on intended use.
Ok on a track bike.
Ok on a high mileage road bike.

But otherwise, intellectual masturbation?

Paul
 
hooksey said:
Matt, why bugger rnd with all that nonsense?
Get em off the shelf at Dam Classic Racing. Got a pair for my 73/750 12 months ago, money well spent  ;)
You know it makes sense !
Hooksey.
Click to expand...
`cos he's in Belgium apparently. As I said Maxton are primarily involved in racing stuff, and for classic you are often stuck with age correct forks, shocks without canisters etc. That reply is the standard copy and paste that everyone gets, seem to remember I got exactly the same years ago. He didn't say if they supplied springs, dual rate or otherwise. I also don't think the cartridge conversion includes teflon bushings to overcome stiction which is almost as big a problem on jurassic era forks. Fantastic service from them, top products, but maybe more than what Matt is after, as he is just looking for some dual rate springs.
 
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