Motorcycle Repair: Honda Z50, honda z50 engine, motorcycles honda

Question
I'm looking for the manufacture year for the following motorcycles :

Honda Z50 engine #Z50-GE-1161807, CHASIS Z50-G 1170860

Honda Z50 engine #AB02E5073920, CHASIS Z50J-5072170

Thank you.


Answer
Honda Z50 engine #AB02E5073920, CHASIS Z50J-5072170
1979

Honda Z50 engine #Z50-GE-1161807, CHASIS Z50-G 1170860
1972 MAYBE....  the GE designation isn't USA and I don't have access to any non-US info. The 1972 series did start with 1XXXXXX numbers, however, but no extra letters between Z50 and the serial numbers, at least in the US.

Bill Silver