Hi Andrew,
My "round motor" Beogram used to do exactly the same - until yesterday evening. It used to take a warm-up before it reached speed or achieved enough torque to pull the record round under the drag of a record cleaner. Warmed up, the table took several turns to come to rest - just enough to lift the record, flip it over, and pop it back on.
I opened it up last night to check a reply I was making on another thread here, and took the opportunity to fit a new belt. Just this simple change has now got the table turning at correct speed in less than one rev and it laughs at a Parostatik; it also now comes to rest after one rev. Way less hassle than stripping down the motor, worth trying first.
Cheers, Steve