I picked up a 1985 660 last week, it was in good shape except for being very dirty and had been unused for a long time. Got it striped down and cleanedand I am in the process of getting it ready to ride. I changed the drivetrain so I can ride the hills here, I put a Suntour 14-34 6 spped freewheel on and I'm waiting for a Shimano triple from E-bay to get here. It's about 90 percent ready now. I have all the original Superbe Pro parts tucked away so I can return it to original if I want to.