Speedo Problems

Next thing to check is that the reed switch is working as the magnet passes by. You can use a test light or a multimeter, which is easier. Open up the connector from the front wheel where there should be 2 wires. As the magnet passes the switch the circuit should close and your test light comes on or multimeter indicates a low, almost zero resistance instead of an open circuit.

On other bikes I have had the conductors fatigue and break inside the insulation over the headlight where they do a lot of bending as the suspension works. The bottom s OK and the top is too, but the cable in the middle isn't.

Does tend to sound like water in a connection though. Good reason to pack all electrical connectors with dielectric grease. Lanolin and silicone based products are good. Preventative maintenance!

Steve

As an aside, for anyone else reading this thread, you can test the speedo by getting a jumper wire and 'making and breaking' a connection across the wheel sensor input to the speedo. That will also tell you whether its the speedo, or reed switch/sensor that is the problem.

Steve