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Thread: 400ex valves(again)

  1. #1
    Join Date
    Jun 2015
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    400ex valves(again)

    i have a 2004 400ex that needs a valve adjustment, do i need to buy valve shims? thanks

  2. #2
    Join Date
    Dec 2010
    Location
    Indiana
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    1,040
    Quote Originally Posted by 400ex23 View Post
    i have a 2004 400ex that needs a valve adjustment, do i need to buy valve shims? thanks

    No shims, butterfly gauge, small wrench and screwdriver, set at top dead center, take round valve covers off, gauge and adjust. Can't remember what they should be set at off hand.



    The exhaust valves should have .005 inches of clearance, and the intake valves should have .004 inches of clearance.
    1984 Honda 200M ATC
    1985 Honda 200X ATC
    1986 Honda 200X ATC
    1999 Honda 406EX....11:1, Web Cam / Hardened rockers. Ported. WB CDI. CT Racing header. WB E-Series slip on. Lonestar swinger.
    2001 Honda/KTM 520 Hybrid Quad. Its like a 400EX but twice the horsepower.
    2014 Artic Cat Wildcat Trail XT

  3. #3
    Join Date
    Dec 2010
    Location
    Indiana
    Posts
    1,040
    1984 Honda 200M ATC
    1985 Honda 200X ATC
    1986 Honda 200X ATC
    1999 Honda 406EX....11:1, Web Cam / Hardened rockers. Ported. WB CDI. CT Racing header. WB E-Series slip on. Lonestar swinger.
    2001 Honda/KTM 520 Hybrid Quad. Its like a 400EX but twice the horsepower.
    2014 Artic Cat Wildcat Trail XT

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