Note:can't fit BBS02 or BBS01 motor just fit BBS02B BBS01B motor, please check the outlook of your damaged controller this is the updated version with If IRFB3077 mosfets fitted in the controller. this controller include 6V light and Gear and Shift sensor connector BBSHD controller for replace 48V1000W or52V1000W Just fit BBS03/BBSHD 48V or 52V 1000W motor, please check the outlook of your damaged controller this controller include 6V light and Gear/Shift sensor connector Note:This New version have 48V controller and 52V controller 48V controller is compatible with 48V ( max output voltage 54.6V) batteries. 52V controller is compatible with 52V ( max output voltage 58.4V) and 48V( max output voltage 54.6V) batteries, please choose right version base on your battery voltage. If you use 48V (max output voltage 54.6V ) battery for 52V controller C571-30-506. LCD will display wrong battery capacity. Battery can not Completely discharged But motor work normal If you use 52V (max output voltage 58.8V ) battery for 48V controller C769-51-501. LCD will display ERROR 07( it is means over voltage). motor can not work Package include: 1pcs 48V 750W 25A C571-30-512 controller.