K&N High Flow Air Filter

K&N High Flow Air Filter

1019-0818 (MFG #: DU-9001)
$145.99
$145.99 $145.99
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K&N High Flow Air Filter
K&N High Flow Air Filter
    K&N High Flow Air Filter

    K&N High Flow Air Filter for Yamaha WR426F Dirt Bike

    K&N
    $145.99
    $145.99 $145.99
    SKU:1019-0818

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    Description

    K&N Powersports High-Flow Air Filter

    Upgrade your machine’s performance with a K&N High-Flow Powersports Air Filter. Designed to increase airflow while providing superior filtration, these premium reusable filters help your engine breathe better for improved horsepower, throttle response, and overall performance.

    Built with oiled cotton gauze media, K&N filters capture dirt and debris while allowing more air to reach the engine compared to traditional paper filters. The result is better performance and long-term reliability for motorcycles, ATVs, UTVs, and other powersports machines.

    Unlike disposable filters, K&N air filters are washable and reusable, helping reduce maintenance costs over time. With proper cleaning and oiling, one filter can last for the life of your vehicle.

    Key Features

    • High-flow design improves airflow and engine performance

    • Superior filtration protects your engine from dirt and debris

    • Washable and reusable for long-term value

    • Durable oiled cotton gauze construction

    • Direct OEM replacement for easy installation

    • Designed specifically for motorcycles, ATVs, UTVs, and other powersports applications

    Why Choose K&N?

    K&N is a global leader in high-performance filtration, trusted by riders and racers worldwide. Their powersports air filters are engineered to deliver maximum airflow without sacrificing engine protection, helping you get the most out of your ride.
    Technical Specifications
    • MFG. Part Number DU-9001
    Vehicle Information

    Yamaha WR426F Dirt Bike (2001-2002)

    The Yamaha WR426F is an iconic off-road motorcycle produced for the 2001 and 2002 model years. Specifically designed for enduro riding, it stands out with its robust engine and a platform focused on all-terrain performance. It features a four-stroke, single-cylinder, DOHC, five-valve engine with a displacement of 426 cc. There were no significant generation changes or major engine overhauls between the 2001 and 2002 models. The core engine specifications remained consistent. The primary distinction lies in the factory restrictions imposed on the 2001 model (airbox lid, muffler insert, throttle stop) to comply with noise regulations. These restrictions could be removed for closed-course competition, unleashing the engine's full potential. The 2002 model is generally cited with a maximum power of approximately 58 horsepower, representing the engine's unrestricted output, whereas the 2001 model was officially listed at 47 horsepower with restrictions. The WR426F was offered as a single model, with no distinct trim levels. FAQ:

    Q: How can I ensure this part fits my Yamaha WR426F?

    R: To confirm exact compatibility with your motorcycle, please use our year and edition selector located at the top of this page.

    Maintenance

    ComponentIntervalDetails
    Engine Oil ChangeEvery 5 or 10 hours (depending on use)Recreational use: every 10 hours. Aggressive/Race-level use: every 5 hours. It is recommended to change oil and filter with each oil change.
    Oil FilterWith each engine oil change
    Air Filter ServiceEvery 5, 10 or 15 hours (depending on year and use)2001 Model: recreational every 10 hours, aggressive every 5 hours. 2002 Model: recreational every 15 hours, aggressive every 5 hours. Regular cleaning and oiling enhance efficiency.
    Spark PlugEvery 10,000 km
    CoolantEvery 10,000 kmCheck and adjust radiator and sub-tank levels.
    Valve InspectionEvery 10, 15, 20 or 30 hours (depending on year and use)2001 Model: recreational every 20 hours, aggressive every 10 hours. 2002 Model: recreational every 30 hours, aggressive every 15 hours.
    Top-End InspectionEvery 20, 30, 40 or 60 hours (depending on year and use)2001 Model: recreational every 40 hours, aggressive every 20 hours. 2002 Model: recreational every 60 hours, aggressive every 30 hours.
    Bottom-End InspectionEvery 40, 50, 80 or 100 hours (depending on year and use)2001 Model: recreational every 80 hours, aggressive every 40 hours. 2002 Model: recreational every 100 hours, aggressive every 50 hours.
    Chain MaintenanceRegularlyRegular cleaning, lubrication, and tension adjustment to prevent premature wear.
    These intervals are provided for general guidance. Always refer to your Yamaha WR426F owner's manual for the most accurate and detailed information.

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