I have been talking by email with Vito Ho at Taizhou Quanshun Motor Co. They make the QS Motors. Vito suggested a 13''X3.5'' 8KW 273 50H V3 motor with a Kelly KLS96601-8080I controller. So this was purchased this morning with an extra Yamaha Vino 125 rear shock on ebay.
Vito is the guy I talked to before when I upgraded my Motorino scooter, he is always very helpful and a pleasure to deal with.
Ray and Gabriel