QSMOTOR 1:2.37 Gearbox QS138 Brushless Inner Rotor PMSM Liquid Cooled Electric Dirt Bike ATV 138 V3 4000W 90H Mid Drive Motor

Long Range E-motorcycle Ebike Motor Fardriver 72450 Smart Controller 72v 4000w QS138 90H V3 Liquid Cooled Mid Drive Assembly

Rated Power	4000W
Rated Voltage	72V
Max Torque	120  N.m
Weight	16kg
Speed	4100rpm
Certification	CE/ROHS/EN 15194

Equipped with the Qianshun 138 90H V3 liquid-cooled mid-drive motor and the Yuandrive ND72450 liquid-cooled controller, this high-power 72V dual liquid-cooled powertrain kit features precisely matched parameters to deliver robust and abundant power output. The comprehensive liquid-cooling design effectively mitigates thermal degradation caused by high temperatures, ensuring stable operation even during prolonged heavy-load usage, hill climbing, or high-speed riding. Supporting Bluetooth-enabled parameter customization, the system operates smoothly with minimal noise, offers excellent waterproofing and protection, and is compatible with the frames of most electric motorcycles and vehicles-making it the premier choice for high-performance mid-drive assemblies in both electric motorcycle modification and complete vehicle assembly projects.