pclark, you made a excellent choice, and purchase. You won't be one bit disapointed! And so people don't understand the the liking of the Doo 900, eh? The Ride, and "Balance", the heart of the Doo 4 stroke is way, way above the Yam Viper, or AC 7000. A good friend has 2, 3 cyl Yama/Cats. The Doo 4 Strokes are of "intended modular design", and produced as such. Thus the easy, enjoyable, balanced ride! Not a "shoehorned", unfitting, unbalanced adaption. So it is. My clutched 900 Doo will run with, out perform the Yama/Cats all day long! Been there, done that! Doo now has the 4 stroke market completely covered, no matter what flavor you want. I always thought that would be Yamaha's to have themselves? Sad, but they, YAMAHA had NO such desire to be that! I remember when Yamaha was very big in the snowmobile business, but that was very long ago. I always say ride what you like, and enjoy, or it won't be muckh fun!