Trouble with rega white belt seating properly

It probably has to do with your motor being seated properly.You have to take off the belt loosen the screws on the plinth that are either side of the pulley.Then pull the motor down so the top of the pulley is centered and lower than the sub-platter.Tighten up the screws and put the belt back on.It should be fine now.

I returned the first white belt I purchased due to the same problem. It is a manufacturing defect. Ask for an exchange.

Mine worked fine right away (on my P3-24) and doesn't travel.

Thanks,I tried to loosen screws and pull down the motor,couldn't get it to move down.The place I bought it said to try talc power which I can't find around here.I'm returning it for replacement as Frank had same trouble.It jumps down about quarter inch and then woobles,goes up,hold steady for a while and does same thing all over again.The belt is riding high on the subplatter when it holds for a while.

If you have the old motor suspended by rubber belts the screws at the plinth if loosened enough with right sized allan key(3 turns approx.) will allow you to reseat the motor.If of course the rubber suspension belts are not worn (replaced these once).I have had this issue myself and it is not cured until the Rega motor sits correctly,never had to return a belt.Don't worry about fiddling here it won't destroy anything just make sure the arm is locked down.The top of the pulley must be lowered to stop the problem you describe of the belt riding up.I got the tip from Vinyl Asylum initially and it has always worked for me,I believe it is the Rega "official method" for this issue.