The motor I used was a NWSL Flatcan 12 x 20mm Double 1mm Shaft (#1220D-9) I ordered mine on-line from this company. You may be able to buy one, or similar alternative locally. I added: a flywheel – 1.0mm shaft ID, 10mm OD not countersunk #435-6; shaft adapter bushing 1.0mm ID x 2mm OD to provide enough diameter to match the gearbox shaft #10171-9