750g should be a European F2 type bike, no idea what year. The engine number looks like 1978 (several changes from all previous years). Carbs from any SOHC 750 should work on any SOHC 750 - the intake spacing, displacement, and such are the same, the throttle cables changed a bit. It depends on what mods were made to the carbs and what mods you make to the engine/intake/exhaust whether these particular carbs will operate well without retuning them.