I searched the forum and found one thread about the Ski-Doo 600 Ace motor. I am 95% certain that I am going to buy one this fall in the Ski-Doo Expedition sport configuration. My only question is, how does the engine handle loads while towing. I will preface this by saying that I will be coming off a 1996 Skandic 500. I have never had problems pulling whole moose out with this sled and just don't want to be disappointed with the 600 ace motor.