I am having trouble with my front brakes. After riding a little while the front brakes freeze up. The brakes engage and the brake grip can not be squeezed. When I break the connection at the master cylinder it releaves the preasure and I can ride home. When I bleed the brakes I have brakes until I ride again and the problem repeates itself. I have reworked the master cylinder with the kit I bought from the dealer. What is the permanent solution? David