I have found that new technology in fuel and engine control improves MPG. My 2005 Triumph Rocket 3 motorcycle(2300cc) gets up to 50mpg, the same as my 1973 Norton 750 Commando. The Rocket 3 produces 140hp(electronically limited) and 147 ft. lbs. torque. The Norton produced 60 hp at the crank. Never checked the torque. Gary