Having fitted a new rear brake lever to my bike I know find that it will not tighten up enough to stop the brake pedal moving under heavy pressure.Looking at the connecting part from the pedal to the brake rod at the rear of the frame which also has the adjusting part on it the splines are not in good condition and would really need to be replaced.I have posted a wanted add in the classifieds but would appreciate any help on the subject or how to rectify the problem.I can fit a return spring and adjuster but need the connecting part