Check that the pulley isn't slipping on the motor shaft ... it's very common in Rega's and a small drop of superglue fixes it.
Slow Rega P25
Recently, my previously trusty P25 has had trouble getting up to proper speed (even with some gentle start up help). In fact, if I don't assist with start up rotation and instead just flip the switch, the platter won't move at all. The belt isn't slipping and the bearing seems fine. So I'm guessing it's the motor. Anything else I should check before plunking down 150$ (or whateve a new motor costs these days)? And wouln't you know it, some friends are stopping by this weekend for a BBQ and a couple have mentioned wanting to hear my "fancy" turntable. Figures.