Does anyone use a thermostat on Wr 426? In cold temps. engine runs cooler.I'm talking 32 and below. I searched for inline T-stats that fit in radiator hoses, with little luck. I've seen KTM uses them on some bikes. Dirt Bike or Dirt Rider had an article a while back about covering 1 radiator with something to block the airflow. Any info. about T-stat would help.