T H E O L D G R E E N B E E M E R
RIDING A 1974 BMW R90/6 FLAT TWIN
FRONT BRAKES : TIME FOR AN UPGRADE
WARNING: IF YOU TOOK THE BRAKE ROTORS OFF THE WHEEL READ THIS FIRST!
The last modification I recently made: Twin disk brake conversion. This really
should be the first one on your list if you are planning to ride one of these
motorcycles. The standard single disk brake is a real '' exiting '' set-up.
I managed to ride it for 22 years on and off, no problems ....on low
traffic roads, but this mono-disk is very highway unsafe indeed.
I picked up the extra parts a few years ago, caliper, rotor, fork-
slider. Task one was to make a new piston for the caliper.
The old one was a total loss, actual a nice opportunity
to make a pair of these. So from now on, Stainless
steel brake pistons. No more corrosion: Period
Here we go, hollowing the new piston out saves weight but you can leave it solid as
well, I never experienced any problems with that on another Até brake caliper
Até 40mm caliper, old corroded and new piston
The new simplified stainless steel version
That's better, new piston new seal, ready to roll and no more worries about corrosion
NOTE! The dust seal I have used here is an AFTERMARKET type which is a lot
less flexible than the original item. The sealing skirt / lip is one fold shorter com
pared to the original and total '' working '' travel not as long. Watch out not
to pop the seal from the calliper by pumping the piston too far outwards!
Also; don't forget to renew the piston return O ring / hydraulics seal!
You can get these aftermarket rubber parts here. I am not sponsored, just helping you out
Continue to Brakes, part two
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M rev 2021
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