I have to mostly agree with Tarzanman - driving a fast street car, and riding a bike are two vastly different things. I have no doubt that you will pick it up quickly, but it takes seat time.

36 months @ $69 is $2484. Assume that you put $1000 down on a new $8500 bike. After 3 years, you would have paid $3500, leaving $5000 more to pay at one of the following interest rates: 13%, 17%, 19%, or 23%. If you were ever late on a payment, even once, your rate would immediately jump to 29%. This is not a good deal. You would be much better off to buy a used beginner bike for the first year, then get a new bike that you can mostly pay cash for next year.