After a great wee run last weekend, commuting this week was cut short by the red FI light coming on; this was because the oxygen sensor heater had 'failed'.
Replaced the sensor and found that the reason for the apparent failure was that the lower fairing was rubbing against the sensor and wiring and severed one of the wires for the heater element; verified by getting the correct resistance reading when measuring at the sensor side of the broken wire.
The full details have been posted here:
