• Sportsman 400 450 Top End Rebuild: Piston, Rings, Top End Gaskets

    Rebuild your top end with this complete kit.  The kit is centered around a new Namura piston kit.  These pistons are top quality and include all the features of the more expensive pistons like teflon coated skirts, anodized domes, and machine finished heads.  This kit includes a STANDARD 87.89 MM piston kit with rings, pin and circlip.  The top end gasket kit includes head, base, side cover and exhaust gasket to rebuild the top end of your Polaris 400. Even includes the valve seals!  Don’t ever re-use old gaskets when rebuilding your engine! High quality non-asbestos materials are used in kit.  Includes all of the following parts shown in the photo including:

     

    • Std. Piston Kit
    • Head Gasket
    • Base Gasket
    • Valve Cover Gasket
    • Exhaust Gasket
    • Cam Cover Gasket
    • Water Outlet Gasket
    • Valve Seals (4)
    • Camshaft Adapter O-ring

    This top end repair kit fits the following models:

    2001-05 Sportsman 400

    2008-14 Sportsman 400

    2004-05 Ranger 400

    2010-14 Ranger 400

    2011-14 Hawkeye 400

    2006-07 Sportsman 450

    $129.95 $116.96
  • Sportsman 400 Top End Gasket Set

    Kit includes head, base, side cover and exhaust gasket to rebuild the top end of your Polaris 400/425/450 four stroke motor. Even includes the valve seals!  Don’t ever re-use old gaskets when rebuilding your engine! High quality non-asbestos materials are used in kit.  Includes all of the following top end gaskets shown in the photo including:

     

    • Head Gasket
    • Base Gasket
    • Valve Cover Gasket
    • Exhaust Gasket
    • Cam Cover Gasket
    • Water Outlet Gasket
    • Valve Seals (4)
    • Camshaft Adapter O-ring

     

    This gasket kit fits the following models:

    2001-05 Sportsman 400

    $49.95 $44.96
  • Trailblazer 400 Top End Gasket Set

    Kit includes head gasket, base gasket, reed valve gasket and exhaust gasket to rebuild the top end of your Polaris ATV 400 two stroke.  Don’t ever re-use old gaskets when rebuilding your engine! High quality non-asbestos materials are used in kit.  Includes all of the following top end gaskets shown in the photo including:

     

    • Head Gasket  (Replaces Polaris # 3084731)
    • Base Gasket (Replaces Polaris # 3084729)
    • Reed Valve Gasket (Replaces Polaris # 3084148)
    • Exhaust Gasket (Replaces Polaris #3084439, 3086757)

     

    This gasket kit fits the following models:

    1994-95 400L

    1994-97 400L Big Boss

    1995-02 Scrambler 400

    1994-99 Sport 400

    1994-97 Sportsman 400L

    1996-97 Xpress 400

    1995-02 Xplorer 400

    2003 Trail Blazer 400

    $24.95 $22.46

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