Fitted to the K75S until 09/87, and all 8 valve K100RS models throughout production. The flat centre part of the bar measures 170mm or so across the lower edge. For the wider K75 bars fitted after 09/87, please see HAK08147. The bar end weights HAK53246 are meant for these bars.
These are also a useful alternative to the flat bars on the R100RS, if you want a bar of the same width with a small (circa 4cm) rise.