I went out today for a ride. Temps were around 60F. I got the bike warmed up driving out of town. Once I got into the country doing 55mph the bike started cooling down. By the time I got back the temps were running right at the very bottom of the normal range (touching the cold range) on the gauge. Once I started riding around town again it went back into the normal range. I'm guessing this is a sticky thermostat. Where is a good source for purchasing such an item?