What kind of brake performance should I expect from the front disc of my ‘81 CM400T? When coming to a firm stop, applying the front brake will dive the front end bringing the bike to a slow stop. When firmly applied at a stop, I can get the wheel to break free with some effort. Bike still has the original pads but I did rebuild the master cylinder (less the reservoir) and bleed the system. I do have some concerns that the oring between the plastic reservoir and body is leaking. Any suggestions?