Cb-650 Custom single disc brake master 1980, I am trying to replace the brake oil cup on the master cylinder and it won't budge upwards even with attemping to pry with a screwdriver. Is there something holding the oil cup in on these bikes? I am going to try to heat it with a hairdryer and try again, but I really don't want to damage anything try to get this real stubborn bugger off. Help advice appreciated. Thanks in advance. Tim C.
