Yesterday and today I've battled with my Aurora. All sorts of muck was in and around the gear set. I had to disassemble the motor in order to remove the plate that the freewheel is attached to, then by unplugging the motor wires connectors at the controller I could remove it completely from the bike.
So with the freewheel still attached to the motor plate, I went to
Moons Cycles in Ipswich around the corner from me, and they were really helpful, Simon the manager in particular, who spent quite a while trying and successfully freed the freewheel from the plate. It was so tight that he had to screw the plate down into some wood on the workbench in order to use enough torque through the tool to free the freewheel! To top it all off, they wouldn't accept any payment! Rare excellent service and I will no doubt return there for all my future purchases.
I shall be re-assembling everything tomorrow, should I be doing anything while I have it all open:
Grease the motor?
Use any specific oil/lubrication on the new freewheel/gearset?
Clean anything?