1986-1999 Yamaha YFM350FW Big Bear Air Filter (KNNYA-2597)Description Off road replacement air filter built for extended use in dirty, dusty riding conditions while providing clean carburetion even at high altitude. It generally requires no jet changes when fitted as a direct element replacement. Features High air flow with excellent filtration Washable and reusable element Direct replacement, no jet changes generally required Ideal for dirty, dusty off road conditions Performs reliably at high altitude