SL120-50B

  SL120-12-50B motor is SPM or IPM motor , 60V 1200W Peak 4KW ,  3000RPM , and Shaft D15X 25mm  

 Senli motors provide sprocket 219H 12 teeth . 

 Controller Kelly KBS 7212 or KLS 7212.

 Rear sprocket 7075 80 T;