As you ride your bike for an extended period, the air filter is going to be very dirty and lose its effectiveness. You should change it after riding your bike from 10000 to 15000 miles, and that’s going to ensure you get the best results. You see, if you don’t change the air filter of your bike for too long, it’s going to get super dirty inside. That’ll cause a clogged-up filter and thus, your engine and other components will not be able to work at maximum efficiency. That’s why after riding your bike for about 10 thousand miles to 15 thousand miles, you must change the air filter.