New Brembo P4 30/34s @ 90 EUR Ea.

[ksoholm]

One more find during my RGS brake upgrade research - Italy's Carpimoto has a great deal on Brembo P4s - fantastic outfit to do business with:
https://www.carpimoto.it/en-US/Brand_Brembo/4292_20516568-Brembo-P4-30.htm

Kristian

[helicopterjim]

They have great deals and their shipping to Canada is really quite cheap.

[mcfly998]

Great call - Thanks for letting us know. 

Just ordered a pair in titanium colour for delivery to the UK. 

[sideshow]

Can you use these on an 81 Jota as an upgrade? Excuse me if thats a stupid question

[Grant]

Yes, once you fit caliper adaptors.

[sideshow]

Hi grant, can you point me in the direction of the correct adaptors?
Do I need to change the original Brembo master cylinder for this?

thanks in advance

Todd

[Grant]

You can buy adaptors on Ebay or others are available.
Attached is a photo of the adaptors on my bike.
I went with a 16mm m/c compared to a 15mm as standard.

2019-10-28 10.22.50 by Grant Duguid, on Flickr

[lawrence]

I would suggest that you try the 4-pot calipers with the original master cylinder before committing to buy one with a larger bore.  I like the feel/action of the original master just fine when combined with the new calipers. 

[sfcpiet]

You can buy adaptors on Ebay or others are available.
Attached is a photo of the adaptors on my bike.
I went with a 16mm m/c compared to a 15mm as standard.

The stock M/C may be nominally 15mm, but the piston is actually 15.8mm, just about exactly 5/8", as is commonplace in hydraulics.  Lever geometry can make a big difference.

piet

[sideshow]

Thanks so much for all your help

[ksoholm]

Lads,

The PS16 is *just* right with 2 P4s; a very common set-up on many 1990s Italian bikes, and I have it on my Moto Guzzi Sport 1100. I am happy with it, no chance of lever getting too close to the bar, but I would not use a smaller MC. Many upgrade their twin-P4 setups with Brembo RCS19s for more positive lever feel.

Kristian

[sideshow]

As I just bought the bike, and was doing project planning, I wanted to know my options, Having now  found the master cylinder welded from a previous accident, the decision was easy , I just ordered a PS16 to replace the original   in the photo, so that with new callipers and discs, things should go pretty well, thanks for all your help,  New P4-30 Calipers are on the way, now I just need to find the mounting brackets. All original parts are heading for catalogued storage.

[DavidH]

Well spotted Kristian, and thanks for posting the link.

As ever when swapping calipers, make sure the PADS are compatible with your discs.

Some suppliers of the P4 30/34 calipers send them out with pads meant for SS discs.  These will rip up your cast iron discs quickly.  And the replacement of discs will make the pads and calipers seem very cheap.
Check the pads when purchasing against your chosen pad manufacturers advice.

[Laverdalothar]

if you need replacement disks in SS, Michael Stöcker can sort you out:

Sport-Connection
Michael Stöcker
Erbacherstrasse 62

D-64658 Fürth

e-Mail: info@sport-connection.de
Phone: +49  6253 - 86489

On his webpage he offers them for 140€ (just the rings, the carrier needs to be kept and bolted onto the new rings; so - only available, if your disks are not made of 1 piece but of ring and carrier)

[Laverdalothar]

One more find during my RGS brake upgrade research - Italy's Carpimoto has a great deal on Brembo P4s - fantastic outfit to do business with:
https://www.carpimoto.it/en-US/Brand_Brembo/4292_20516568-Brembo-P4-30.htm

Kristian

that is weird: he has different prices for different countries! If I click on the link above, it shows me the calipers for 90€. A pop-up window asks me if I want to change my location to Germany and if I click yes, the price goes up to 110€! With shipping costs, there is still a difference of roughly 17€/caliper. this makes me question how serious this seller is...