What is the mileage of Yamaha NMAX 155?

Yamaha showcased the NMAX 155 @ 2016 Auto Expo in February. It is a maxi-scooter and is powered by a 155cc single-cylinder engine with maximum power of 14.8 BHP with max torque of 13.5 NM. Yamaha hasn't made any official announcement on its launch, but it will come out soon with a 90k price tag. The mileage details of the scooter are not out yet.