In this innovative DIY project, the creator transforms a standard bicycle into a powerful electric bicycle by repurposing a car alternator converted into a permanent magnet brushless motor. The project involves carefully selecting and modifying gears to achieve an optimal gear ratio, which reduces RPM while increasing torque. The bicycle is powered by custom-built lithium-ion battery packs providing approximately 1,500 watts of power, paired with a high-performance 10-kilowatt brushless speed controller. During testing, the modified bicycle demonstrated impressive performance, reaching speeds up to 70 kilometers per hour and potentially capable of 85 kilometers per hour. The creator conducted range tests revealing remarkable efficiency: at an aggressive throttle, the bike consumed 23 watts per kilometer with a range of 66 kilometers, while a moderate throttle approach yielded an impressive 100-kilometer range on a single charge. This project showcases creative engineering, demonstrating how automotive components can be ingeniously repurposed to create high-performance electric vehicles.
