Mid-mounted motocross electric bike

Mid-mounted motocross motorcycle high race oil to electricity, front 21 inches rear 18 inches all-terrain off-road high race, speed ratio 4.33, long-drive pipe 990 pull 3.5 kW mid-mounted motor, the power is very grumpy, 72v45 high-power lithium battery, because I am too small, I can't ride, suitable for people above 1.7 meters, don't ask for short legs