mileage problem (please guide me)

You have to take care the following things to maintain a fuel economy better with your bike as below. 1. Regular servicing, 2. Periodic carburretor cleaning, 3. Total engine overhauling in every three years, 4. Proper tyre inflation as specified, 5. Charge the fuel from trusted fuel station pumps, 6, Check the wheel bearings and compression rings frequently from damage & replace them with genuine parts. 7. Drive in correct gears for the specified speed limits. 8. Do not let other poor skilled drivers to use your bike. All the amove measure gives you a better performance to your bike drive as well as a fuel economy too. All the best from oarnamav.