Hi: I just purchased a new Burgman 400. The manual calls for a break-in of no more than 4000 RPM, for the first 500 miles. I'm a pretty big guy and find that 4000 RPM, doesn't get me anywhere. (35-40 mph). Is it advisable to move it up to 4800 or even 5000 RPMs. Will this adversely affect future performance? Anyone out there with a similar experience?