Bought another '82 250r tonight $300. Needs front fender, and rear brakes don't work. The guy said it needed o-rings for the master cylinder Sound right? It fired right up. I could smell the 2 cycle, like he mixed it 24:1 He did say it was mixed on the rich side.
Can anyone give me ideas where to start on the rear brake?

TIA
PS. The picture is my other '82 250r (My daughters). This one was for my son (no picture yet).