I *think* that BMW changed from the direct-mounted on the transmission shifter to the linkage connected one in 1979 on the R100/80 bikes (?). It seems I'd need to get a left footpeg assembly from a 1979 or 1980 bike to transplant and then I could use one of Justin's shift linkages on the "new" 1978 /7 bike.. The R65 footpegs won't work as they're designed to bolt to the frame from a point behind/to the rear by the swingarm pivot, whereas the R100/80 bikes of that period still use the forward (under the carb) mounting point for the footpeg bracket. Hmmm.