Polaris has entered the under 100 hp four stroke engine category in snowmobiling with the Prostar S4 engine. I recruited some of the Longville snowmobile club to come out for a day of riding the new Prostar S4 and let me know there thoughts on the engine.
Is this the engine for riders who want a smooth, easy to ride, fuel efficient, and easy to maintain package that allows for more time on the trail? Watch and find out!