I am in the process of a brake rebuild.
After 6 years and under 10k miles.
The callipers on my other bike lasted 20 years, and they were not this bad when I had them done.
One piston on the front caliper was seized.
I would ride off and I could feel that the brakes were on, then after about 3 minutes suddenly it would free off. It got hot, and metal expands when hot. The piston freed off.
The rear caliper piston was rusted to death.
In both cases I would call it cheap steel with cheap and minimal chrome plating.
So off came both callipers and away to Powerhouse for a full recon with stainless pistons.
3 weeks later nice shiny calipers refitted.
The rear master cylinder died during bleeding.
Not a problem, get a new one.
Oh, no longer available.
So, I can try a seal kit, but if the cylinder is ducked what to fit?
Anyone had to replace their rear brake master cylinder using something other than the correct one?