Hi guys, new to all this Im riding a 1992 CB 250.. the front brake goes soft randomly but with a few pumps is hard again. I have bleed the brakes and done every thing we can think of.. the folowing has been sujested, -- dodgie seals in the master cilender? -- Soft spot in the pipe that expands? -- or a leaky calaper? Please note im not loseing any brake fluid.. Please help, cos i need the bike to get around. Thanks in advance. PS, excuse the poor spelling.