If the BMW could be summed up with one example of how well thought-out it is, it would be the button on the left-hand switchgear that, with a single push, disables all the electronic rider aids and, in the process, transforms the bike from a mild mannered, comfortable and practical bike into a raving lunatic. The button should have ‘party mode’ stamped on it instead of some symbol that obviously means something to the person who came up with it, but not me. Simple, effective, brilliant, and exactly what the bike needs. In fact, it’s exactly what all the bikes need but don’t have. On the other bikes, turning off the electronics so impromptu wheelies can be enjoyed is a multi-stage process that gets undone if you switch the ignition…