Guys i wonder if you could help me ID which model RD these forks are off and also the master cylinder..check these pics out and see if you know as i cant order parts unless i know the right model...

The forks look like late model i.e 1980 RD200DX . Can you measure the diameter of the stanchions as pretty sure they were smaller diameter then the RD250 and RD400. Tony

upper forks are 30.2 mm and lower 39.25..

If you prise out the rubber cap from the very top of the fork where it goes into the top yolk and find a large hexagon bolt I'm sure these are 1979/1980 RD125DX/RD200DX forks. Tony

thanks Tony i will take a peek..

ok theres no hex nut Tony only what looks like a core plug.. see attached [ic