Another TBN member had over heaqting problem, gauge not working...here is what he found:
So my problem turns out to be the temp sensor that screws into thermostat housing. Its what tells the relay to kick fan on. my fan should kick on right at the halfway mark and if i barely tap it it the fan will kick on, as long as guage is above that. Dealer is sending me one under warranty but I'm looking for one in stock so I have it before the long holiday weekend. part number 1g910-83040. Nobody has this item in stock.
see this thread
http://www.tractorbynet.com/forums/atvs-utility-vehicles/263117-rtv-1100-overheating-problem.html
Plykins, is your dealer the one in Temple, or in Austin, or?