This my work in progress. VIN 1173 from 12/80. First registration in 01.01.1981 in Johannesburg.
As far as I know, the 80G/S series started at VIN 6250001 from 05/80.
The frame was strengthened, swingarm 100mm extended, strengthened rear frame and a few other mods. I am waiting for my 48mm forks to go in soon.