Previously, the client utilized a standard 3000W hub motor power kit. However, local riders demanded superior acceleration, stable continuous power delivery, and adjustable performance—requirements that traditional kits, often prone to overheating and lacking tuning flexibility, failed to meet, particularly regarding heavy-load hill climbing, high-speed cruising, and off-road endurance. Following extensive field testing, the client confirmed the excellent compatibility between the QS138 70H V3 mid-drive motor (with reduction gear) and the Fardriver 72340 programmable sine-wave controller, subsequently placing continuous bulk orders to fully replace their original powertrain solution.

The QS138 70H V3 3000W mid-drive motor features high-quality 70H magnetic steel, a V-shaped rotor structure, and a 1:2.37 planetary reduction gearbox. It delivers a maximum torque of 98 Nm, a continuous power output of 3000 W, and a peak power of 11 kW, achieving an energy efficiency of up to 94%. Capable of stable operation across a wide temperature range (-20°C to 80°C), the motor offers smoother power delivery and greater flexibility than traditional hub motors. It is ideally suited for diverse applications, including urban electric motorcycles, mountain climbing, heavy-load cargo transport, and conversions for electric ATVs and off-road go-karts. Its efficient heat dissipation design supports prolonged operation under heavy loads, effectively reducing the client's after-sales failure rates.

The Fardriver 72340 controller features an IP67 waterproof rating and a die-cast aluminum heat-dissipating housing, alongside comprehensive protection mechanisms against overcurrent, overvoltage, undervoltage, overheating, motor stall, and short circuits. It maintains stable power output during long-distance high-speed riding and heavy-load hill climbing, effectively mitigating risks such as thermal throttling and motor burnout. Compact and plug-and-play compatible with most mainstream electric motorcycle frames and mid-drive conversion setups, the controller significantly enhances the client's modification efficiency. 

Currently, this powertrain combination has become one of the client's best-selling high-end modification kit, capable of meeting usage needs across all scenarios—from daily commuting and off-road mountain riding to heavy-load transport.