Keeping the Roadster motor cool has been discussed before, but looking at the air cooling system it looks like the motor cooling fins could be easily choked by dust in the cooling fan blown air (like a vacuum cleaner sucking dirt off the road ! ). A layer of dust on the fins will: A) decrease the heat transfer out of the motor, acting as an insulator. B) decrease the airflow. and that is assuming no debris (leaves, straw etc.) gets suched thro' to block the inlet into the fins !! (on left hand side of motor) as shown below: I don't believe clearing the fins is part of the normal service, but may well allow the motor to run much cooler... just see the dust on the outside of the motor, below the PEM .. AFTER its been past the fins ! Question: Has anyone removed the ducting to the motor air inflow & cleaned out the fins ? If so, what was the dust/debris build up on the inlet fins ? Was it straight forward to remove the ducting ? (assuming PEM is removed) Thoughts ?