motor138It’s QS Motor QS Motors. QS motors are available in a wide variety of types and specifications. There are different models such as QS138, QS205, QS273, etc. The power options range fromIt's Electric Motorcycle Kit QS138 90H V3 4KW 7200rpm with 1:2.35 gear box Mid Drive Motor Kits with Fardriver ND72680 Controller 350A 680A