Simple light bulb burn out. Remove speedo head. 3 metric hex head screws on indicator plate. 1 screw holding cluster unit. Push forward on unit to unhook unit from tank, note; it slips into a rubber grommet. Unplug cluster wiring.Remove bracket holding gauge in the unit. You'll see 2 bulb sockets. Replace both, always. Lube speedo cable with graphite cable lube before reassembling (maintenance). Make sure to ease unit hook (you'll see what I'm talking about) back into rubber grommeted hole. A little blue Loctite wouldn't hurt in reassembly. Wear sunglass when turning on ignition, you'll be blinded by your new illumination.

