Test drive

[stusco]

So i got my gpz tank back from bike paints (i was getting the liner removed) turns out there was three failed liners in the tank and no rust wtf
So i get a new black chrome pingle tap fill with fuel and go for a ride ,its a big old boat compared to my Gamma and lc but ill get used to it anyway i got 4 miles before grinding to a halt with the back brake seized on took me three attempts at getting home after it cooled down bummer

[gray]

Caliper strip on the cards I think- could be corrosion in the sliding pins or corrosion on the piston / brake cylinder wall or corrosion in the seal groove under the rubber seal in the caliper ( use a dremel to clear it out or a little Allen key held in a pair of Mole grips - that gives a good sharp edge to clear out the groove).
Or if your'e still running the original rubber brake hose it might have collapsed internally - allowing fluid into the caliper when you brake but not allowing it to flow back and release brake pressure when you're off the brakes

[moizeau]

Just had something similar on my front brake. It was the return hole in the master cylinder blocked. This can be confirmed by unscrewing the bleed nipple a fraction then tightening it without touching the brake lever/pedal. It releases the built up pressure.