Map out the circuit into a schematic, get the markings of the DIP14 IC above it and look at the datasheet. To me it looks like it might just be a ferrite bead.
Something seems wrong, in that on a scooter you have battery and motor and this board is not built to handle substantial current, so is the controller for the motor built into it and this is just for the throttle? It might help for you to trace where the wires go, map that out and provide it to us... or it might not help, it is sometimes a steep hill to climb trying to guess/do things remotely based on small pictures.