Looking at making the switch from 2 stroke to 4. My MC is completely stock except for a can and some clutching. I don't know a thing about these new yamaha 4 strokes, but I really like what I've seen and heard about the Apex. How does a stock out of the box sled do in the Mountains? I'm very happy with the Mountain Cat, just looking at the dependability of a four stroke. Can someone else who has made the jump help me out here?