The 500SS is one of Ski-Doo's most reliable motors. Any motor can have problems, and especially those that are abused or modified.
Don't worry about reliability (because it's there) and enjoy your sled.[/b]
i have ben thinking of get a new sled beacse i have ben told by a lot of peploe that two storke engines are easy to blow up how true is this before i go and look at a 4 stroke[/b]