Testing a hall-effect throttle requires a 4.3 Volt DC power source and a Voltmeter. Apply 4.3 Volts DC positive to the throttles red wire and 4.3 Volts DC ground to the throttles black wire. Attach a Voltmeter between the black wire and the green or blue wire and twist or push the throttle. The Voltmeter should vary between zero and 3+ Volts. If the throttle has zero or low output Voltage that points towards a bad throttle.
I used a 3AA battery holder that was about 4.8V iirc. Don't worry about the actual voltage (4-5V) just make sure you indentify positive, neg. and wiper wires (usually blue or greeen mine was yellow). Then wire it on the bike without runaway fears
EDIT for re-reading - the controller I couldn't rule out other than it will only hook to usb when it has power. If you motor is good and throttle is wired properly, that only leaves the controller. They prob gave you proper wiring codes with your kit, but I can say with my Chinese controller the wires weren't the same colour as their manual, double check..
Last edited by Chillboy; 05-12-10 at 06:26 AM.