took the 121 07 xrs with 1.75 track for a run the other day, snow was frozen early morning so not a lot of cooling, there was 137'' sleds and a 144 nitro they ran fine but my xrs would run hot every 3 to 5 miles, even running 50+mph down the lake, i have the large snowflap the race flap i think its called on my sled and one of the guys noticed the flap was almost fully extended running the lake and all the snow was shooting out underneath, question is do you think this flap would make such a differance compared to the regular/stock snowflap? strange thing is i never had an issue with this sled running hot before but can't recall if snow conditions were as hard either.