K&N 99-09 Yamaha YFM250 / 00-09 YFM400 Replacement Air Filter K&N Engineering YA-4001

K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.