moemoke wrote:
which got me thinking,
could you get a water cooled motorbike (trail bike) radiator and a 12 volt computer type fan make up a box for it all to fit into and put some ducts on it and volia, a cheap small, simple heater. well just a thought

i reckon you'd build one this style for a whole lot cheaper....
forgive me for asking but why do people want a heater? is it a rego/engineering thing?
if anyone does go down ths route... from memory my KLR 250 had 2 nice neat little radiators on it... but only one had a radiator cap.... ie the auxilliary one only had and in and an out pipe, which would make the perfect core for this type of application.... or even a 2nd radiator conversion....