Am looking at this unit for a 2-up replacement from out KZ 1500 classic. How does this unittake bumps with a passanger. With a Bump or does it glide over driveways without the "bump" from the rear fender contacting the tire? What kind of gas mileage does this brut get. Dealers say 40-45 and tests from magazines say mid 30´. We would like some input please. Thanks