metalstudman1, fantastic advice.
If you can't slip the driven off without hitting the frame, then yes, you need to top it slightly.
Clean clean clean. The jerkiness happens when either the drive or the driven aren't moving freely and stick. In addition, there should be a bonze/copper looking bushing that rides between the halves (sheaves) of the drive variator. In many cases, that thing is just worn out to the point where it is flat out gone. Does it have something like this that rides on the shaft of the drive pulley?
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