Just got back from a week in Northern Ontario. The conditions were very hard with no loose snow on the trails and glare ice lakes. We had XR 1200's with us and a few 600 etechs also in XS chassis. My wife had real issues with over heating and her sled would run 30 degrees warmer than my sled and they are exactly the same. My sled ran warmer than the XR 1200's also. My observations were that the snow flap on the 16's sit too high and allow whatever snow and ice to exit the rear of the sled rather than stay in the tunnel to help cool. The XR 1200's flap would sit much lower. The real problem is my wife weighs 130 lbs and her sled doesn't squat down while riding which makes it even worse. We had to switch sleds often so I could cool her sled down. I would leave my sled with the temp @ 170 degrees get on hers @ 200 degrees. Within a few miles I would have her sled down to 170 and she would have mine up to 200. I'm thinking maybe a spring change on her sled will help even though she doesn't feel her sled is stiff. I'm definitely putting ice scratchers on both sleds for next year. We did get fresh snow later in the week and all the 1200's ran the same temps no matter who was riding what. The funny part was we had no issues with hyfax sticking just high engine temps. Do they offer softer springs for the Renegade X pkg sleds? I only read about heavy riders going to heavy springs but rarely see lighter riders going to lighter springs.