1200 Rear Brakes

Brid Caveney

Brid Caveney

Junior member
Location
Austin Texas USA
OK - I'm new on here, but have been working on Vintage Laverda's for quite some time. We are just finishing up the Custom Mirage build shown in my avatar, an 82 TS, and have 2 more Jota America's we are fettling right now. I'm sure this topic has been battered for some years - but, has anyone ever retrofitted another master cylinder to the rear - getting rid of the 15mm stock one? We managed to source a Brembo PS12 for the Mirage, but on one of the America's - SS everything on there, with HH sintered pads, the brake is still just about non existent. I hope I don't get laughed out of here!!! Go easy on me please!!  :D
Brid.
 
Your bike being a USA model I presume it has the left side gearshift with crossover shaft. It's hard to tell from your avatar photo but it looks like you have rearset footrests. That disk brake setup (right side brake pedal with rearsets) was particularly woeful because the linkage was poorly designed. It was little more than an afterthought to comply with USA requirements, apparently with little consideration of functionality.  But it can be made to work OK.  If you have a 12mm master cylinder which you can fit, that should improve matters considerably. You can also tweak the lengths of the lever arms in the brake linkages to get better mechanical advantage.
 
Yes - LH shift, but not rearsets. As mentioned, we got a 12mm cylinder from Wolfgang in BC, but - cannot find another 2 (for both America's) anywhere. They are like hens teeth! The lever arm on the master is very short - however, seems anything longer would foul the rear footrest mount. Searching around online, I found a Ducati rear cylinder, for a TT1/TT2 -- 8XR0037, that looks almost identical, has 50mm mount bolt centres, but cannot seem to find out what the bore size is? If anyone has a couple of PS12's to sell, we'd buy them  ;)
 
What size is the rear m/c from a Laverda 500?
From memory it looks smaller than the triple's.
 
Grant said:
What size is the rear m/c from a Laverda 500?
From memory it looks smaller than the triple's.
Click to expand...

12mm  :D

Probably be able to find something suitable on most italian middle-weights of the time.  Grimeca make made a very similar M/C, might be some NOS floating around... somewhere.

piet
 
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