Single disc front master cylinder

[68C]

Due to hand arthritis problems I have modified my V11 Rosso Corsa braking to mimic the older Guzzi linked brakes, the footpedal working one front disc and the rear disc.  The only problem is the front master cylinder is not really matched to a single disc making it stiff and wooden.

 

Does anyone know the part number of a Brembo master cylinder that looks like the original item but has a smaller piston, alternatively of any other bike that may have had such an item?

 

I am keen to keep the original look so it matches the clutch master cylinder.

[nuevototem]

Hi, you can use the California vintage parts cos it have a combined braking too! 

 

Best regards! 

[AndyH]

Like the idea!

 

Are you using some kind of proportioning valve and is the rear master cylinder the right diameter for this as well. Strikes me that the V11 original might now be too small to drive two slave cylinders and need too much travel to apply the requisite force.

 

Any thoughts?

[68C]

Hi NUEVOTOTEM,

Does the Cali have the remote reservoir like the V11? I am keen to have it match the clutch master cyl.


Hi ANDY H!

The rear is a little long in travel but seems acceptable. I am considering adding a second rear master cylinder with a 'Y' shaped link, one for the front and one for the rear, I could even mess around with the braking proportioning then. The disc size seems Ok but worried about rear pad life.

My old T3 just has a simple union joining the two pipes and the brake switch with no moving parts. I have got hold of a Cali proportioning valve which may come into play if I don't go the twin rear master cyl route. Some later Calis even have a ride height sensor like most cars, the less weight at the rear means less braking force to the rear. then of course there is ABS and radar controlled auto brakes and........I think I'll go and lie down.

[GuzziMoto]

For the front brake M/C, perhaps one from a single disc V7. Not sure of the reservoir set up on that.

There are also plenty of Ducati's, mainly entry level ones, that have a single front disc.

[Skeeve]

 

Does anyone know the part number of a Brembo master cylinder that looks like the original item but has a smaller piston, alternatively of any other bike that may have had such an item?

 

I am keen to keep the original look so it matches the clutch master cylinder.

 

Dunno if it matches the clutch master, but the Jackal came w/ a single front disc. Guzzi sold a dual-disc kit for it @ one point, with a 2nd disc & new master cyl... maybe find a shop who did the upgrade for a customer & still has the original kicking around in spares? 

[sp838]

These guys have tons of Brembo stuff, including the "Goldline" masters, calipers and rotors:

 

http://www.oppracing.com/

 

Here is the page for OE brembo front mc's:

 

http://www.oppracing.com/category/1011-oe-front-brake-master-cylinders/

 

This one is 1mm smaller than ours, which I believe is 16mm:

 

http://www.oppracing.com/product_display/30777-brembo-oe-front-brake-master-cylinder-psc15-gold-without-reservoir-wlever49-reg/

 

If that's still too much, this one has a 13mm piston:

 

http://www.oppracing.com/product_display/32311-brembo-oe-mc-ps13-black-without-reservoir-wlever50/

 

You could paint it gold...

 

They even include blueprint spec sheets on most everything, the one above for example:

 

http://www.oppracing.com/images/cmsuploads/Brembo/OEM_Schematics/oppracing%2010-5053-53%20brembo.pdf

 

so you can check to see piston diameters and select one with a smaller bore. They have been a great resource for me with all my reconfigurations, and one customization I haven't shared with the forum yet hehe...

[68C]

Thanks Skeeve,  unfortunately doesn't match but it has shown me I need a 13mm piston for a single disc.

[sp838]

If you need a 13mm mc, check out the link I posted above.

[68C]

Thanks SP838,  that is a great lead, the PS13 for the TZR125.  125's are popular for learners in the UK so I should be able to get one and spray it gold.

[sp838]

Weird that it doesn't exist in gold... I'm searching, will post if I find it. In the meatime, here's on in the UK on Ebay:

 

http://www.ebay.com/itm/CAGIVA-MITO-125-FRONT-BRAKE-MASTER-CYLINDER-WITH-LEVER-1992-/221177222268?pt=UK_Motorcycle_Parts_13&hash=item337f30947c&vxp=mtr

 

These mc's were also fitted on these bikes:

 

Cagiva Mito 2 1992-1993
Cagiva Mito Euro 2 2004
Cagiva Mito EV 1994-2003
Cagiva Mito EV 6 Marce 1999-2000

 

http://www.oppracing.com/product_display/30760-brembo-oe-front-brake-master-cylinder-ps13-black-without-reservoir-wlever50/

 

Good luck!

[68C]

THanks, I also found one here:

 

http://www.ebay.co.uk/itm/351024612682?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

 

Your Ebay UK search result handy as it shows they are on small Cagivas as well. And that one is near my brother-in-law in Pinner.  He has a 2.3 triumph converted to a trike with a trailer which I found very scary when I had a brief ride (drive?).

[docc]

. . . . I had a brief ride (drive?).

A spin? A go? A "bit of sport?"

 

Nudge-nudge-wink-wink . . . know what I mean- know what I mean?

[68C]

"Say no more,"

[GuzziMoto]

A nods as good as a wink to a blind bat.