I had a 1996 Artic Cat fan cooled 440 that had cold weather starting problems. It's not that it would'nt start, you could'nt pull the engine through to get it to start. It ran fine all the time, untill it sat overnight at about -30 or more. Removing the spark plugs and drive belt did not help.
Usually this happend when I was ice fishing north of Glennallen in March. We would tow the machine to the lake, open the hood so the sun would hit the engine and pour a little gas down the spark plug holes. After it warmed up a bit, several hours, the engine would little by little start to turn over. Once you could pull it through a couple of times it would fire right up. I was using Heet in the fuel and Amsoil in the oil tank.
I sold the Cat and bought a new Polaris wide track, 500 liquid cooled. Made a run from Wasilla to Farewell Lake two years ago. Guess what, it does the same thing. Everyone elses machine in our group started just fine. This included an old Polaris tripple, and a new Ski-do super wide track. Polaris dealers have been no help. Anybody have any ideas?