Rotors and calipers

[1969mustang]

I have both wheels out of the Jota at the momnttook the opportunity to replace the box section swing arm that was on it, really ugly thing !

Just had new BT 46 tires fitted, so before i put the front wheel back in i would like some feedback re the stock rotors and calipers vs the 4 pot Brembo and floating rotors.

I have a set of used calipers/ adaptors and rotors and am condsidering fitting them , they came with the bike, years ago.

My questions , are they a direct replacement to original rotors ?, my originals are looking a bit worn, not measured them but will to check minimum thickness. Original are heavy !

I am not interested in doing the fork reversal, so if its a straight forward swap out, leaving the forks as they are,,, can i retain original master cyinder ?,

Are there any draw backs, and advantages? im an average rider at best, so not looking to outbreak anyone or stand this thing on its nose, but the last time i rode the bike i rememember the front brakes being pretty lacking in ,feel,but they stopped me !

Appreciate any thoughts / Advice
Thanks

 

[henrywillms]

Both topics of improving stock brakes and upgrade to 4 pot etc have been covered many many times....do a search for lots of info from the experts, I am not one.

You say your not too demanding:

.......first clean up caliper pistons and replace or grease piston and seals and check or replace dust covers covers..see if that's good enough for you.
Wolfgang can supply if needed.

To get even better feel update m/c to different size....do a search for specs etc.

Im ok with just refresh of the calipers when mine start to feel too wooden.

Upgrade to 4 pot and different disks....again lots of combos and options...you may need a different m/c. Remember the skinny forks may now become noticeable with increased braking.

Brake pad type can also make a difference to feel and stopping. Right option can depend on rotor material.

 

[TeddyG]

4 pot Brembos, floating rotors, and an upgraded m/c would be a superior upgrade over the stock configuration, but the question is if those rotors will fit onto the wheel hub and align to the 4 pot calipers. EBC has rotors that supposedly will fit, and I believe reversing the wheel will prevent the speedo from working. If those rotors are larger diameter you may have to fashion a mount for the calipers to fit. The m/c has to be compatible w/ the calipers, and the brake pads need to be compatible to the iron or stainless rotors. My Aprilia Tuono w/ identical 4 pot Brembos has awesome brakes, and you can buy a new or used Brembo m/c on these Aprilia Forums:

https://www.apriliaforum.com/

RSVR.NET Forums

Aprilia owners forum

www.rsvr.net

 

[Paul Marx]

4 pot Brembos, floating rotors, and an upgraded m/c would be a superior upgrade over the stock configuration, but the question is if those rotors will fit onto the wheel hub and align to the 4 pot calipers. EBC has rotors that supposedly will fit, and I believe reversing the wheel will prevent the speedo from working. If those rotors are larger diameter you may have to fashion a mount for the calipers to fit. The m/c has to be compatible w/ the calipers, and the brake pads need to be compatible to the iron or stainless rotors. My Aprilia Tuono w/ identical 4 pot Brembos has awesome brakes, and you can buy a new or used Brembo m/c on these Aprilia Forums:

https://www.apriliaforum.com/

RSVR.NET Forums

Aprilia owners forum

www.rsvr.net

The question has been done to death on this forum.
Paul

 

[TeddyG]

That doesn't help answer this person's question- here's an EBC rotor that fits -

 

[1969mustang]

Well thanks for the info, I have read up a lot of the previous posts, doiing the install was my main question and Ive ansewered a lot of my own questions this morning.
The rotors fit the Jota rim ok
The calipers have the adaptors as in the picture and fit the fork mounting points, hower the Rotors do not have enough offset to line up with the calipers when installed.
So either i have wrong rotors or a spacer required to mount to wheel, either way i will leave as stock, finish putting the bike back together give it a runs see how the brakes feel and talk with Wolfgang re seal kits / pads etc
Thanks

 

[breganzane]

The best improvement you can make is to reduce or eliminate the friction in the master cylinder, they rely on a sliding joint between the radiused section on the lever and the flat face on the end of the piston. Though it was an excellent product at the time, this is not a great mechanical arrangement and once the anodised hard surfaces wear a little you get mega friction.
Easiest solution is to fit a more modern Brembo MC which have a much nicer actuation which gets rid of most of the friction. Braking feel and power are greatly improved even with the same diameter. Wolfgang usually has them, failing that bevelheaven I guess.

The original disks and calipers (in good order) are pretty decent once on a good MC. And if you're not going to reverse the forks bear in mind that four-spots in front of the forks has got to be the worst look ever! Take a bow Clem (RIP) and Serge.

 

[piranha-bro2]

and I believe reversing the wheel will prevent the speedo from working.

You aren't reversing the wheel, Teddy, just swapping left-to-right fork legs. Agree with Steve, those 4-spots and adaptors flaying about out front would look very odd indeed. Hamish's BMW 4-spots (sort of ) get away with it because they don't require adapters.

 

[1969mustang]

The best improvement you can make is to reduce or eliminate the friction in the master cylinder, they rely on a sliding joint between the radiused section on the lever and the flat face on the end of the piston. Though it was an excellent product at the time, this is not a great mechanical arrangement and once the anodised hard surfaces wear a little you get mega friction.
Easiest solution is to fit a more modern Brembo MC which have a much nicer actuation which gets rid of most of the friction. Braking feel and power are greatly improved even with the same diameter. Wolfgang usually has them, failing that bevelheaven I guess.

The original disks and calipers (in good order) are pretty decent once on a good MC. And if you're not going to reverse the forks bear in mind that four-spots in front of the forks has got to be the worst look ever! Take a bow Clem (RIP) and Serge.

Thanks for that, I will talk to wolfgang next week and see what he has got

 

[Ian Short]

I have both wheels out of the Jota at the momnttook the opportunity to replace the box section swing arm that was on it, really ugly thing !

Just had new BT 46 tires fitted, so before i put the front wheel back in i would like some feedback re the stock rotors and calipers vs the 4 pot Brembo and floating rotors.

I have a set of used calipers/ adaptors and rotors and am condsidering fitting them , they came with the bike, years ago.

My questions , are they a direct replacement to original rotors ?, my originals are looking a bit worn, not measured them but will to check minimum thickness. Original are heavy !

I am not interested in doing the fork reversal, so if its a straight forward swap out, leaving the forks as they are,,, can i retain original master cyinder ?,

Are there any draw backs, and advantages? im an average rider at best, so not looking to outbreak anyone or stand this thing on its nose, but the last time i rode the bike i rememember the front brakes being pretty lacking in ,feel,but they stopped me !

Appreciate any thoughts / Advice
Thanks

Not sure if you have sorted/replaced the stem bearings, upper and lower, but now is the time.