I wondering what weight range would be good for a Record Weight for my 4002.
None! Use no record weights, antistatic mats or other nasties with any Beogram. If your record is warped, put it under press somewhere else (not on a Beogram) or discard and replace it.
Just in case you meant tracking force for a record, 1.2 grams is a good starting place. Different cartridges have different recommended tracking forces.