Check the plate for model code G1-EM5 and you have the 1985 electric G1. Yamaha's shop manual for it is LIT-11616-G1-83, the same volume the factory used across the later G1 range.
That range is wide. Six model years from 1982 to 1989 and thirteen variants, electric and two-stroke alike, all in one book. Anyone keeping more than one of these running gets a single reference rather than a shelf of them.
Emphasis
Diagnosis first, then repair. The electrical chapters walk through motor, contactor and charger testing with the readings Yamaha specified, and the wiring diagram supports tracing a fault rather than replacing parts on a hunch. Mechanical chapters supply clearances, wear limits and torque values for the axle, brakes and steering, with the removal sequences set out in order.
