My newly purchased 1983 Super course rides fine except there is a small "click" more noticable as a frame vib then an audible click when I pedal. In other words I can feel it more than I can hear it. No slippage from the drive train. Happens in all gears high to low. I totally cleaned the casssette chain and shifters hoping it was a grease problem or chain link that wasn't smoothly going over the gears. Click always happens at the same point as I pedal. Here is the weird thing, it doesn't always happen and often after riding several miles then stopping it doesn't happen once I start riding again. Weird huh? . Also changed pedals and its not there. Any ideas? would it be the bottom bracket? Thanks - Joe

Oh should have mentioned there is no play around either crank or the spindle without taking it apart