Bike handling is very good even at higher speeds.
Highway mileage -
Constant speed of 50kmph got around 63kmpl. If you maintain the speed between 40kmph to 50kmph can expect upto 65kmpl.
When I drive the vehicle 60kmph to 80kmph speed mileage has dropped to 50kmph.
City mileage - 55kmph in the Bangalore city traffic.
Post 75kmph speed engine feels more strained.
Checked everything on very recently on a long 400km journey.
But you won’t feel enthusiam in the bike post 60kmph speed. Bike is good and recommended for only short highway drives and in the city limits.