After 2 months of metal work, and 2 weeks of electrical work, I'm basically done with my go-kart.
It is quick as s***! Acceleration is borderline rediculous. Geared for top speed around 30-35mph.

Here are some specs and features:

• powered by 9000-watt DC motor, 10+ hp
• full torque from 0 to 10,000 rpm
• 12:1 dual-gear/chain reduction/transfer
• 51.2 volt, 900 amp deep-cycle battery bank (yes thats over 46,000 watts of constant delivery capable)
• 400 amp PWM (pulse width modulation) controller
• regenerative: brake pedal switch configures motor as a generator and charges battery bank as you slow down
• disc brake on axle engauges as you press the brake farther... going to upgrade to hydraulic and better rotor since the vehicle is quite heavy
• 1000 amp cut-off switch
• key-start energizes 5v, 12v, and 50v circuits... all fused
• electronic throttle sensitivity/range control
• variable torque management/limiting
• LCD/microcontroller displays motor RPM and vehicle speed
• 12V and 50V digital panel meters
• 200 amp current analog meter
• motor temperature digital panel meter
• throttle safety cut-out and other various controls
• 55W headlight

total cost <$2500
Paid for mostly by IEEE branch, which I am projects and finance chair of, and several sponsors.
Last weekend I took it to a regional IEEE conference for project showcase display.








Video of first drive ever:
note: throttle position sensor would not go past 60%. also the tire worn around test subject is protection again possible chain breakage haha

http://www.zuulmusic.com/img/gokart/first.3g2

quicktime format. sorry for the 90* camera