Have recently bought a very tidy 1990 MC18.

The problem I have is that when you apply the front or rear brake, they stick on, so much so that it's impossible to ride.

I have done the easy thing and cleaned the callipers/made sure they are free/floating.

Has anyone had any experience of this before, could it be the master cylinders/valve?

Are their any other things I should watch out for before putting the bike back on the road.

Thanks

Andy