Ian, it’s a cheap sticker to cover the uglier spot on the cap. I had this cap chrome plated cheaply about 20 yrs ago. Looks awful today. I polished the frame and wheels on this bike by hand about 20 yrs ago and try to keep it fresh every season. I had some help getting the white removed from the wheels. The main frame spars are still near mirror finish, but the rest shows its age for now. Old man patina I guess. I did so with only the fairings removed originally. I’ll put up some photos soon. Since the cap is aluminum too, I now know, it should be doable to fix this. I bought this ‘93 model in Aug ‘92 in the US. I painted the original fairings and tank yellow and white after upgrading to a ‘97 front fairing in ‘01.