Some odd things about this bike..........Says its a 78.......Gauges, OEM electronic ignition, and BS34 carbs and hinged seat, say its an 80G........Has an 81 engine side cover, (1st year of a sight glass).
80G had wire spoke wheels, drum rear and Disk brake front. metal side cover, (same type as the Blue one), and hinged seat............
78SE had Mag wheels with Disk brakes front and back, (as this bike has), BS38 Carbs and the same gauges ............All the same as the Blue one
So there looks to be some major changes done so the mag wheels could be fitted to the bike. Not a bad thing at all, just raises questions, especially as it is claimed to be a 78............
I would be asking for engine and frame no's then verifying what the bike is..........If you get the no's ask on here and we will let you know what it is........