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They lengthened the stroke on the Ninja, but the 49 state versions do not have an 02 sensor, which I believe would allow for more precise fuel control. Overall gearing is way to high, too many revs per mile. I think the Ninja in top gear is like the Suzuki in 4th. I would like to see the top ratio where the RPM is 90% of the speed or lower. For the life of me I can not understand why, with a 6 speed transmission you can't have your top speed in 5th. Gear it for 135 MPH at redline and I think you could get 80+ MPG without much effort. 6th gear on any small displacement bike should NOT be useable below 45 MPH, just like in a car you can't use top gear at much lower speeds.
Now if they really wanted to build a MPG bike. use the IDSI honda engine design in aa twin that is cammed for low speed torque and make 6th gear give you 3k RPM at 60 MPH with some decent aero. Bore and stroke the same amount and even two valves per cylinder offset for good swirl and twin plugs.
regards
Mech
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