well..congrats! But heres my 2 cents.....The 450 is really a race quad, and yamaha has built them with that in mind. They anticipate people tearing the motor apart quite a bit..rebuilding and such in between races. It will be a nice fast quad for ya, but its about as close to a 2 stroke as a 4 stroke could be...in other words is going to be a pretty high maintance quad. Keep your service manual close by... unlike the warrior or rappy 350 that live on neglect, the 450 is just the opposite. This is not my own theory either, yamaha will tell you the same thing..not a sales guy looking for a commision...but yamaha. Have fun with your new quad, and i cant wait to see the pics.