One of the best ways to improve the mileage of your Bajaj Pulsar 125 Neon is by following the manufacturer's service and maintenance schedule. This includes regular oil changes, spark plug replacements, and checking tire pressure. Additionally, driving in a more efficient manner can also help increase the fuel economy of your vehicle. This includes driving at a steady speed, avoiding sudden accelerations, and reducing the time spent idling. Finally, be sure to keep your vehicle in good condition by regularly checking for any worn or damaged parts and replacing them as soon as possible.