Modern master with old calipers?

[Autotek]

Im in the tear down stages of a 79 bonneville and wonder if anyone knows if modern smaller master cylinders will supply enough fluid pressure to the original calipers. My plan is to use brembos from a Ducati. Anyone?

 

[Swapmeet Louie]

it'll work.

 

[Autotek]

Sweet thx. I must say that while removing around 60 lbs of stuff that seems to make no sense, i see many ways to improve or make things more efficient, beginning with the braking system.

 

[Swapmeet Louie]

good place to start. I used a brembo master off a KTM on my XS. so, im positive it''ll be fine.

 

[Clifton]

Good article on Mater cylinder ratios.
http://www.vintagebrake.com/mastercylinder.htm

 

[Autotek]

wow, im gonna have to study that when im feeling a bit more like thinking! On the subject, I just ordered R6 rear sets that come with the brembo master as one unit. This will give me the fold away footpeg to clear the kicker and the mounting of the master in one package. I doubt i am the first to do this but I am excited to mount these, and they look trick!

 

[Autotek]

The 79 Bonneville 750 ready for sand blasting.

 

[hillsy]

You'll need to do some creative re-welding on the shifter side to fit the R6 rearset - it has the shifter rod above the rearset as opposed to pretty much every other bike having the shifter rod below the rearset.


As for your MC - just get another one the same bore size as your current set-up and you'll be fine. Calipers don't care what MC pushes their pistons as long as it has the same pressure.

 

[Swapmeet Louie]

As for your MC - just get another one the same bore size as your current set-up and you'll be fine. Calipers don't care what MC pushes their pistons as long as it has the same pressure.

yep.

 

[Autotek]

FYI- found no cracks in the frame after sand blasting.
I assume the ratios work for the rear as well? The chart say for front MC. I typically use the try it and fix it if it dont work method beginning with slightly educated guesses. haha

 

[hillsy]

Most rear MC's are around the same size because most rear calipers are one piston affairs.

 

[Autotek]

Thats what im counting on. The factory one from 79 was a beast and the brembo i am using is one third of the size and im figuring on the same power, much more efficient. I will make it work!