1 Rear brake issues Sat Jun 30, 2018 5:30 am
AL-58
Life time member
I use the rear brake a lot on the sidecar, it helps with the steering a bit. Recently it hasn't worked all that good.
If I stand on the brake pedal, I get some retardation but not much.
Syptoms: rear master cyl has no signs of leakage, brake pads show evidence of getting very hot at some stage, caliper pistons move freely.
I stripped the master cyl, stripped the rear caliper and cleaned everything(ultrasonic cleaner).
The master cyl seals appear fine and like I said no leaks - reassemble
Cleaned and replaced all seals in the caliper, internal seals were not leaking, pistons moving freely. Outside seals were bad.
Replaced the hose from the reservoir just in case.
Once reassembled, it's no different. I have pedal pressure but no braking power at all.
I'm thinking that even though the master cyl is not leaking its obviously not doing much. I know I can put a seal kit in the master cyl (the bore is good) at a cost. There are some inexpensive master cyls available online but I cant find one that tells me the piston diameter which is the important thing.
Has anyone used one of the cheapie M/Cyls with any success? Have a link?
Al
If I stand on the brake pedal, I get some retardation but not much.
Syptoms: rear master cyl has no signs of leakage, brake pads show evidence of getting very hot at some stage, caliper pistons move freely.
I stripped the master cyl, stripped the rear caliper and cleaned everything(ultrasonic cleaner).
The master cyl seals appear fine and like I said no leaks - reassemble
Cleaned and replaced all seals in the caliper, internal seals were not leaking, pistons moving freely. Outside seals were bad.
Replaced the hose from the reservoir just in case.
Once reassembled, it's no different. I have pedal pressure but no braking power at all.
I'm thinking that even though the master cyl is not leaking its obviously not doing much. I know I can put a seal kit in the master cyl (the bore is good) at a cost. There are some inexpensive master cyls available online but I cant find one that tells me the piston diameter which is the important thing.
Has anyone used one of the cheapie M/Cyls with any success? Have a link?
Al
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'93 K1100LT
'08 F650GS (798cc)
'19 R1250RS
+ another boxer engined motorcycle and sidecar
"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"