Went out for a 3 hour ride yesterday, mainly motorway riding and then 'A' road and town riding for the last hour.
Occasional glancing at the gauges and lights during the ride all showed normal until about 1 minute from home when I noticed that the temp gauge had dropped to two bars. When I stopped outside my garage (engine still running) the gauge popped back up to three bars straight away, back to normal.
What on earth could cause the engine temperature to 'drop' while riding? The ambient air temperature was about 10 degrees but I've ridden in minus temperatures many times and the temp gauge has never moved.