BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board

Hi,
After washing my bike bike 2 weeks ago, it wouldn't start. The symptoms were like the ones described when a Hall sensor acts up, e.g., tach needle jumping, turns over, but doesn't start etc. This was a little disconcerting, the bike is a 2004 R with 38K miles. Does this indicate my Hall sensor is failing and should replace now, or is there something I should do to protect it from water. I sometimes get caught in rainstorms and always have driven through them since I have the right rain gear. What do you think?

Gene

gel9001,
I wouldn't assume it was the Hall sensor since the washing caused the problem. Could be the water created a high resistance short that the Motronic doesn't like, in the kill switch, ignition switch or the plug-ins under the tank.
Try removing the stick coils and the bottom plug wires too. You're looking for trapped water and/or jagged/sooty spark tracks. The tach jumping could be the secondary high voltage shorting across the secondary coil.
1-- Does the fuel pump whine when you turn the key on?
2-- What kind of wash was it?

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