Sat. morning I got up to go out for a ride before anyone else was up. Rode about 150kms and about 10K from home I decided to pull off the trail to play in some powder. No problems all morning and then my sled just quit. Sounded like I hit the kill switch but I didn't. I knew right then I wasn't going to get it started again. Checked for spark and nothing. Where should I start? I figure check the wiring on the kill switch first but what next? Stator, MPEM, CDI, plug wires? It was -20C so maybe something got brittle and broke? Sled has 11000kms.