• BMW tech guy showed up first thing this morning...

    Rear-wheel angle sensor fault (which meant it didn't fire off the traction control).

    Probable cause: the install of the cansmart controller for the LED spotlights.

    Not my picture but the bit in the middle of the under-seat area; with two bolts sticking up from it, is the DTC wheel angle sensor:

    Apparently, nothing should touch the sensor, or the wires coming from it. Unfortunately, they've placed it directly under the rear seat, with no protection or warning labels, in the only place anything luggage wise or modding etc can be installed.

    So now the cansmart controller is wrapped in an old sponge and cable-tied out of the way.

    Fingers crossed.

  • So is that what caused the initial lock-up?!
    Had a slight poo-pants moment this morning as my rear tyre slipped about 3cm sideways on wet road letters, fairly confident in the bike though after sliding significantly more sideways on a gravelled corner at 10mph!

  • Yup.

    Apparently, if anything touches it or knocks it during riding, it can fault and completely fail to report anything. This means the engine doesn't manage torque and you have a 250Kg machine trying to deliver all 143Nm of torque to the rear wheel even though you're sideways.

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