Basically, properly driven gear bikes should see more mpg than equivalent scooter because on a scooter you can't fiddle with the gears, someone clever did all the work for you, you paid money to start with to save yourself the hassle of thinking (and you will pay twice throught running costs (belt, fast disapearing tires and around 10% more fuel))
That being said, FI is a very good MPG boost, especially on smaller high performance engine (bikes and scooter have performance engine, they have 100cv / liter and more)
|