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Smog Block Off Plugs - 98-03 Yamaha R1


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  • SKU: AB007
  • Manufacturer: Graves


98-03 Yamaha R1

    California Restricted

    California laws prohibit (in most cases) the use of any aftermarket product whose installation requires the removal of any emissions control related components as regulated by the California Air Resources Board (

    If an item is designated as "Competition and Racing Vehicles Only", we will require a race waiver be digitally signed before an item can ship to California. If an item is to be exported from California, an export waiver is available as well. This is a REQUIRED guarantee from you that a restricted item will NOT be used on any public highway in California; only on private race tracks in racing or competition use.

    Graves Motorsports Yamaha R1 Smog Block Off Plugs 98-03. Graves Motorsports Yamaha R1 Smog Block Off Plugs for the 98-03 model year motorcycles. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the cylinder head used by the air injection system (a.k.a smog pumps or AIS). Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from machined aluminum. There are two reasons why you want to remove the air injection system from your bike:

    • If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.
    • To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.

        Sold set of four

    This part fits the following

    MotorcycleYamahaYZF R119989981
    MotorcycleYamahaYZF R119999981
    MotorcycleYamahaYZF R120009981
    MotorcycleYamahaYZF R120019981
    MotorcycleYamahaYZF R120029981
    MotorcycleYamahaYZF R120039981

    This product was added to our catalog on Thursday 25 January, 2018.

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