Hi, I am new to this forum and i hope you can help, i am restoring a 1983 Honda CBX 550 back to factory condition, i have had my ups and dpwns sourcing some parts but i have now come to a stop, i need to source a rear brake master cylinder, the one i have is no good, the C clip has siezed and cannot be removed after several hours trying to. There are many for sale on auction sites and at bike breakers but all have the same issues, would any of you know where i can source one from.