I thought I would try to fix my master cylinders before I buy new.
I pulled the first one off handlebars took the lever off, Pulled the seal without damaging it. Tried to pull piston out with no luck so I drilled a hole into it’ s face then screwed a self taping screw into it. When it bottomed out the piston spun and then released. I pulled the piston out, took the middle seal off. There was a ton of rust on the piston and the bore. I cleaned the piston and used some fine sandpaper. I used a 12 ga shotgun brass brush with mothers mag wheel polish and a bore mop on a drill to clean the bore. Then carefully reassembled it using brake fluid for lube. Maybe I got lucky with no leaks.
I hope this helps someone.
KK4
I pulled the first one off handlebars took the lever off, Pulled the seal without damaging it. Tried to pull piston out with no luck so I drilled a hole into it’ s face then screwed a self taping screw into it. When it bottomed out the piston spun and then released. I pulled the piston out, took the middle seal off. There was a ton of rust on the piston and the bore. I cleaned the piston and used some fine sandpaper. I used a 12 ga shotgun brass brush with mothers mag wheel polish and a bore mop on a drill to clean the bore. Then carefully reassembled it using brake fluid for lube. Maybe I got lucky with no leaks.
I hope this helps someone.
KK4
