I think maxwell is right. Excessive idle with the belt wearing just one spot on the primary sheave. I try to warm mine up going up the trail rather then letting it idle in the parking lot forever. I go easy on the throttle the first few clicks.
I am going to the snowmobile show because I love the sport in every aspect. Checking out all the new sleds, performance parts and safety equipment is a huge highlight. I really enjoy watching the sport progress and look forward to spending way to much time walking around and dreaming of things...