chrisk
Hero member
- Location
- Brisbane, Australia
Ahhh. That’ll be why they worked so well and are no longer available.
Bagged and gone, along with the damp cloth
Did you find replacements?
Rear Brake Upgrade
- Thread starter IAG
- Start date
Did you find replacements?
Andy
Hero member
- Location
- Auckland, roughly
I’ve got some EBC semi-sintered that I’ll try, plenty of rain here too so I can give ‘em a decent trial
I did this mod probably 30 years ago on my jota and works much better than the linkage setup.
Dellortoman
Hero member
- Location
- Tasmania, Australia
The extended master cylinder mounting plate does nothing to help the mechanics of the braking system. What you needed to do was drill another 6mm hole in the lever arm on the pedal as shown above and connect the link rod to that hole. It would have given a bit more pedal travel, but much more powerful braking.
I did this simple homemade conversion years ago, and to be honest, it made little to no difference to the brake feel or action. It was many years ago now I am back to the non-rear set footpegs as my old knees scream murder after a few miles with rear sets. The non-rear set brake lever has a better feel and action than either rear set setup.
With my similar system I also made a longer bell crank for the master cylinder out of a bit of aluminium plate (8mm I think) to move the link rod further away from the master cylinder pivot for greater leverage against the piston. The bike ended up with tyre screeching brakes. Have a look at the photo of my system above and you'll see what I mean. Photo is arse about from yours because my brake is on the right.
Your brake could have ended up looking something like this:
The only thing the extended mounting plate does is lift the master cylinder to give the additional clearance required between the rear footrest/muffler frame tube and the brake link rod to carry out the modifications described above. You did the preliminary part of the job but didn't follow up with the important linkage modifications.
I found that clearance in other ways on my own bike (bending the link rod and slotting the M/C mounting holes so didn't need the extended mounting plate.
Not that it matters now that you've gone back to "standard" (non-rearset) footrests. But the above info may be of use to those still struggling with a crappy rear brake on a bike fitted with rearset footrests.
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Cam I tried that on my drum rear when it became weak as a kitten only I went longer instead of shorter and that did nothing to improve its performance. I was thinking longer meant more leverage, intuitive but wrong, my brain likes to try practical experiments. What fixed my issue was Judishius' use of a Spray Can of Lubricating Oil that freed up ceased rear set and brake links. I really hate bike components that don't work to their maximum capacity performance-wise and ease of maintenance-wise.