This one is defo original. Back in the day it was a popular paint job to copy according to Dream Machine, who are currently repainting my Exclusiv Sport in Hell Silver 131 and not the colour referred to in the add. The rest will be (very expensive) stickers, as Mikey says.
This looks like a good bike at the right price to me. 90S, 100S, 100CS all sought after bikes now, but as ever with old airheads money will need to be spent on it somewhere.
This one for sales on mobile.de you pay your money and take your chance.
https://suchen.mobile.de/fahrzeuge/...searchId=02741c0c-0032-6720-4d4f-c66049b21170