I will try emailing them.No instructions its just 2 wires with a plug on the end. I figured a dc motor should be able to be reversed by changing polarity or something. Just thought people on here might of dealt with this before
It depends on the type of DC motor it is (series, shunt, compound, etc) - how it is wired inside.
Here's an explanation that says it better than I can:
The field winding reversal in a dc series motor will lead to reversal of direction of the motor due to change in direction of magnetic field. It is important to remember that if you simply changed the polarity of the applied voltage, you would be changing the polarity of both field and armature windings and the motor's rotation would remain the same.
Maybe someone here will know how to do it, in the mean time I'd try contacting the motor supplier or manufacturer and ask them how to reverse it.