Take the flywheel to the lathe for processing. First, heat the gear ring with fire to make it grow. Then put it on the machined gear ring, and naturally reinforce it after cooling. Fix the starter on the diesel engine, fix the battery in a proper place, then replace the motor with a silicon rectifier and the regulator with a silicon rectifier. Just connect the wires as needed. Remember to connect the electric lock. I won't go into details, but I know how to change it.