Understood, however we are operating these bikes in the Philippines (myself in Cebu) where the ambient temperature rarely drops below 25c at any time and more recently is nearer to 35c in the day. When riding in traffic my AIT sensor has reached readings of 53c - so we are not worried about colder climates at all, obtaining the most efficient cooling is most important to us. My Nuda 900R has the advantage of a digital readout of coolant temperature as well as the normal bar gauge the same as fitted to the TR650 so I am able to see more precisely what is going on. The fan is set to cut in at 104c and goes off at 94c. Comparing the bar gauge on both bikes, it appears to be about the same for the TR650, in fact I would go as far to say that as both bikes share the same radiator and temperature sensor, they are likely to be set exactly the same. Running on the open road my (Thermostat-less) Nuda 900R reads an almost constant coolant temperature of around 88-90c and runs really well. My TR650 Strada runs at a similar range on the bar gauge and also runs really well. Both bikes run a standard Glycol based coolant and so far the use of an expensive waterless type has proved unnecessary. The thermostat modification that I have now carried out on 9 different bikes has made the most difference in city traffic where the radiator is required to operate at absolute maximum efficiency to avoid overheating which several owners have previously experienced prior to the changes. At near to zero cost and carried out in about an hour, this has to be one of the most successful modifications we have made to our bikes here.
Could be. At stationery idle in the garage my Terra fan kicks in at 104 Celsius (219 Fahrenheit) and off at 95 Celsius (203 Fahrenheit).
