Front Brake sticking on a 1977 suzuki gs550

[Guest]

So i got a 77 gs550 and i recently cleaned the brake hoses and master cylinder and caliper, and everything seemed to be ok until i took it on a test ride through my subdivision, as i was riding it, the brakes started to lock and eventually made me stop completely and not move. i loosen the bleeder screw and the pressure released and sprayed out some brake fluid and the brake worked again until i took it for another ride and the same thing happen. how do i stop the front brake from locking up? im new with bikes.

[cowboyup3371]

Completely clean the master cylinder to include a very tiny hole which serves as the return port; it is more than likely clogged with junk.

It would be a great idea to put on stainless steel lines instead of reusing the stock rubber ones

[gsgeezer]

Completely clean the master cylinder to include a very tiny hole which serves as the return port; it is more than likely clogged with junk.
It would be a great idea to put on stainless steel lines instead of reusing the stock rubber ones

What I did, too. You will be glad when you upgrade to ss lines.

[Nessism]

You say you cleaned the system but how? Did you remove the master cylinder plunger and pull the piston out of the caliper? If not, it's time to do so. Also, as the others mentioned, replace the brake line.