In 1980, an external, Hitachi brand starter generator was introduced and the engine was modified. Repair parts are still available except for the crankshaft assembly, the voltage regulator/starter relay and the internal st/gen stator & field. In 1976 the so-called '2pg'-a 244cc, Fuji Heavy Industries/Robin Engine-with an internal starter generator (st/gen), became standard. It also benefits from a more efficient differential. As Scowboy says it is the 3PG and it generates 11 hp.
