Homebuilt Kids Electric Bike Heavily modified to 58mph racer
What started life as a cheap kids electric bicycle gradually became a high voltage, 7.6kw monster.
I picked this bike up off of craigslist for $60. All I knew was that the frame looked perfect for my build, theres a relatively large battery compartment in the middle and the swing arm could be used to house a mid mounted motor.
The original motor is joke, actually most the components are junk except the frame. To date the only thing I kept original is the frame, and and rear wheel. Everything else has either been discarded in the trashed or heavily modified. Footpegs was welded to the frame. The YZ125 seat was modified to fit the frame. Custom bracket was made for the Pit bike brake. Custom motor mounts was welded to the swing arm. The bike does 58mph on 96V and still wants to pull. The motor is by Transmagnetics with a custom high speed winding as my intentions was to build a race bike.
Running on the Street @74V 20AH 7.6Kw Power
Motor Test Run @74V
Mongoose CX24V450W Frame
Zoom DH Fork
Fox Float Rear Shock
20" BMX Wheels
Shinko SR714 Front Tire 16 x 2.25
Pirelli ML75 16 x 2.75
Pit Bike Front Brake Twin Piston Hydraulic
Transmagnetics 4-7Kw Motor w/ Internal cooling fan
Large Rear Sprocket
74V 20AH Lipo Battery or 96V 10AH Lipo Batt (for racing)
Sabvoton Sinewave Controller 96V100A