After all the excitement about the crappy thermostats in the 650R I changed mine tonight. First things first. I cracked open a beer. Mmmmmm beer. Drained the rad fluid. Pulled the thermostat. Looks Good so far. Swap it out with the new one. Mix up a 50:50 mix of coolant to distilled water. Add the new fluid. Save the extra for top up. Check some torques. Run a check on the old thermostat. Looks like I got lucky on mine. Hope the new one works as well.