I recently fabricated my scooter for a 1000 watt motor to fit and drive it(my Zappy classic). It works Great! It pulls me(220lbs.) up very steep hills without even slowing down as if they were not hills.
Problems: 1). When accelerating too fast from low speeds, it pulls the front wheel off of the ground. It will throw me right off if I am not careful. If I lean forward too much to hold the front down from lifting up, it either lifts me up anyway, the belt skips or both. It will hit a top speed of around 12-15 mph.
2). I want to put a bigger gear on the motor. I think if its bigger, more teeth will be grabbing the belt and the belt won't skip. Plus it will give me a lot more speed. Faster than 15mph. I want to go UP about 3-4 teeth or at least try several different sizes of gears but I can't find any anywhere. Only 13 tooth 5mm which is what I already have. I would like to try out a 17 tooth pinion gear for starters. WHERE in the World can I get it? A 17 tooth 5mm belt Pinon gear.Do they even make them?