Maintenance method of scooter: 1. The cleaning frequency of the air filter is every 2000km 1 time. Because the air filter position of scooter is lower than that of straddle-type vehicle, and the air intake direction is generally horizontal, the filter is dirtier than that of straddle-type vehicle during driving. 2. The oil change frequency is 800 to 1500km once, and it is cleaned once with a unified engine cleaner. A bottle of 500cc can be used three times. When changing, drain 30% of the engine oil, then add a unified engine cleaner to start the car for 5 minutes and let it all go. Blow in high-pressure gas from the refueling point, blow out the residual engine oil in the gearbox and inject new engine oil. Be sure to clean the bottom of the volute in the oil pan before installing it.