I realize that the s40 is a 600cc class bike, but at the time I had mine ,my room mate owned a Kawasaki 454ltd. In a regular cruising situation on the city streets of Norfolk, I really had to wring it out just to keep up with him. The S40 is a single thumper that is not rev happy, and you will find a large number of smaller displacement motorcycles that will just flat out perform over the abilities of the S40. I would almost wager that my old GS400 had more ooomph than the S40. Although I do agree with the philosophy found on these pages, I think that the S40 is getting a bum rap due to the 600cc displacement. It just acts different than any twin or four on the market with the same displacement. Remember, this is just an opinion. I have ridden this bike and am familiar with it’s behavior. Ride safe and God bless. Jon D.