Found this website that the owners can supply you a special part to help keep your bike cool while not in motion.
As all BZM motor owners know, sitting on the grid before a race, (specially on a hot day), can be very worrying.
As BZM have an external water pump, it only works while the rear wheel is turning, thus the motor will over heat while the bike is not in motion.
Take a look at this very handy invention.
http://mac-racing.ca/
Look under the side heading of 'Clutch Housing'.
