Auke, I believe when equating the time into distance, dividing the distance to be traveled by the suggested KSR economy in kilometres per liter, than measuring the capacity of the fuel tank, averaging lap speeds and then estimating how many 2.68 km laps the motorcycle can complete on one tank of gasoline a undisclosed distance and time was estimated .
It was then not taken into account the altitude on the far side of the Kaeng Krachin circuit, nor was the relative humidity at 2pm, nor the specific density of the 100 octane race fuel causing a inaccurate estimation of the undisclosed distance possible to travel.
OR
they might have just forgot to refuel in the excitement.
LivingLOS Hold your breath, I beleive there is a proposal for a Chiang Mai track in the pipeline as we speak.