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Thread: 400ex Head, vavles, and cam specs

  1. #1
    Join Date
    Jul 2003
    Location
    Lynchburg, va
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    4,442

    400ex Head, vavles, and cam specs

    well i had to take the head off my 400ex to have the sparkplug hole retapped and i was wondering if somebody could possibly give me the

    Head Torque specs:

    Cam Timming specs:

    and Valve Specs:

    your help is greatly appreciated considering i dont have a repair manuel
    IF YOU DONT HAVE WINGS U DONT HAVE A PRAYER!!

    2004 Honda Rancher 400 A/t: Project quad. mods to come after i repair it

    2006 TRX 450ER: HRC kit, AC blackline pro peg nerfbars, AC front bumper, DOXO shockwears, DMP Graphics kit


    (SOLD)2002 400ex: shaved front plastics, k&n air filter, rejetted carb, Holeshot mxr rears, holeshot mx fronts, ac pro peg nerfs, ac front bumper, tag handle bars, Magnum rev box,nacs head light caps, nacs E brake block off, TC shorty exhaust, n-style graphics kit, and dirtbike clutch lever and perch

  2. #2
    Join Date
    Feb 2002
    Location
    Mansfield,OH
    Posts
    4,604

    Re: 400ex Head, vavles, and cam specs

    Head Torque specs:33 LB Ft

    Cam Timming specs: just line the parelel marks on the cam sprocket up with the head. Look at it when you take it apart.

    and Valve Specs:.004in .005 ex

  3. #3
    Join Date
    Jul 2005
    Posts
    532

    Re: Re: 400ex Head, vavles, and cam specs

    Originally posted by K_Fulk
    Head Torque specs:33 LB Ft

    Cam Timming specs: just line the parelel marks on the cam sprocket up with the head. Look at it when you take it apart.

    and Valve Specs:.004in .005 ex
    and just incase you dont know make sure the lobes of the cam are facing down. and when you set the timing make sure its at top dead center.
    450r DRG POWER, HOUSER-RACING,OHLINS, AMSOIL, ENGINE-ICE, TAG-METALS, RENTHAL.
    2008
    C.W.I.R.A-open grandprix quad champion
    C.W.I.R.A- 3rd open pro quad
    C.W.I.R.A-2nd pro-am production quad

  4. #4
    Join Date
    Jul 2003
    Location
    Lynchburg, va
    Posts
    4,442

    Re: Re: 400ex Head, vavles, and cam specs

    Originally posted by K_Fulk
    Head Torque specs:33 LB Ft

    Cam Timming specs: just line the parelel marks on the cam sprocket up with the head. Look at it when you take it apart.

    and Valve Specs:.004in .005 ex

    thanks a bunch guys...now tomorrow all ive gotta do is drill the head out and heli coil it and put it all back together...
    IF YOU DONT HAVE WINGS U DONT HAVE A PRAYER!!

    2004 Honda Rancher 400 A/t: Project quad. mods to come after i repair it

    2006 TRX 450ER: HRC kit, AC blackline pro peg nerfbars, AC front bumper, DOXO shockwears, DMP Graphics kit


    (SOLD)2002 400ex: shaved front plastics, k&n air filter, rejetted carb, Holeshot mxr rears, holeshot mx fronts, ac pro peg nerfs, ac front bumper, tag handle bars, Magnum rev box,nacs head light caps, nacs E brake block off, TC shorty exhaust, n-style graphics kit, and dirtbike clutch lever and perch

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