The different air filter cartridges from two-wheeler of the same model and type were collected. The influence of air filter clogging on vehicle mileage was analysed. Using an air filter integrity testing device, the maximum permissible pressure drop at different air velocities was determined. The road test has been performed for the vehicle mileage by employing air filter samples. Finally data has been collected for various samples at different operating condition and analysed. Finally, the recommendation for air filter replacement has been carried out.