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Thread: 400ex CDI rev box

  1. #1
    Join Date
    May 2010
    Posts
    140

    400ex CDI rev box

    I bought a 400ex and i wanted to know if it still had the stock cdi in it it sayed shindengen on it. is this a stock cdi box or an aftermarket

  2. #2
    Join Date
    Aug 2008
    Location
    Central NJ
    Posts
    11,326
    Pretty sure stock iirc. Dont waste your money on a CDI box btw, it wont help the 400 as it stops making useful power well before its redline.
    If it's stupid, and it works, it isn't stupid. - Murphy's Law
    2000 426EX,sold
    2004 450R WIP
    -Longtime A.A.D.S. (Accessory Acquisition Disorder Syndrome) sufferer.
    400EX Frequently Asked Questions, CHECK HERE FIRST!

  3. #3
    Join Date
    May 2010
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    140
    Yea I do a lot of trail riding. You don't think it is worth it?

  4. #4
    Join Date
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    Location
    Central NJ
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    11,326
    Originally posted by djwilliams0822
    Yea I do a lot of trail riding. You don't think it is worth it?
    I know its not worth it.

    What many perceive is a power gain is nothing more than a different ignition curve. The problem is all your paying for in most cases is a XR250 cdi. The other problem is it makes it a pain to start with such a cdi b/c its designed for a kickstart bike.

    Id spend my money elsewhere, such as a port and polish on the head or an 04-05 trx450r carb.
    If it's stupid, and it works, it isn't stupid. - Murphy's Law
    2000 426EX,sold
    2004 450R WIP
    -Longtime A.A.D.S. (Accessory Acquisition Disorder Syndrome) sufferer.
    400EX Frequently Asked Questions, CHECK HERE FIRST!

  5. #5
    Join Date
    May 2010
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    140
    Ok thanks

  6. #6
    Join Date
    Aug 2008
    Location
    Central NJ
    Posts
    11,326
    Originally posted by djwilliams0822
    Ok thanks
    No Problem
    If it's stupid, and it works, it isn't stupid. - Murphy's Law
    2000 426EX,sold
    2004 450R WIP
    -Longtime A.A.D.S. (Accessory Acquisition Disorder Syndrome) sufferer.
    400EX Frequently Asked Questions, CHECK HERE FIRST!

  7. #7
    Join Date
    Dec 2010
    Location
    Indiana
    Posts
    1,040
    My White Brothers CDI was well worth the money over 10 yrs. ago an I still run it. ANYONE getting to my neck of the woods can stop by an ride it with the stock CDI, an then with the WB CDI an you will see the differance whether your balls out across a field or fast trails in the woods. Its a 406 with Web cam, ported with 3 angle valve, 11:1 ......I don't believe all the aftermarket CDI's are probably the same.....some may be better than others....mine must be one of the better ones. Mine was worth the money an I wouldn't sell it an often recommend them to others, by the way when the 400EX came out it won the Baja 1000 in its class as a 416 with a White Brothers CDI.
    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

  8. #8
    Join Date
    Jan 2011
    Location
    400ex forums
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    2,228
    Dragongunner, did you build your motor on your 400?
    IM HARD ON EQUIPMENT!

    GOON: look pro, go slow!

    Spider Graphix, Magic Motorsports, ATVRDIERS.COM, MOM&DAD

    ****Breast cancer awareness! I love you grandma!****

  9. #9
    Join Date
    Aug 2008
    Location
    Central NJ
    Posts
    11,326
    WB CDI is literally an XR250 CDI. Seriously if you dont believe me buy one and swap it.

    Look carefully at your CDI DragonGunner, it will say shindengen. Also notice white brothers initials arent exactly laser cut in it-more like hand scribed.

    Anyways heres what Mickey Dunlop said... http://www.atvriders.com/articles/askmickey1.html

    3rd or 4th post down on that page.

    Heres more info on it: http://www.exriders.com/vbb/showthre...0&pagenumber=2

    You guys want to spend your cash on it, go right ahead.
    If it's stupid, and it works, it isn't stupid. - Murphy's Law
    2000 426EX,sold
    2004 450R WIP
    -Longtime A.A.D.S. (Accessory Acquisition Disorder Syndrome) sufferer.
    400EX Frequently Asked Questions, CHECK HERE FIRST!

  10. #10
    Join Date
    Jun 2011
    Location
    Green Bay,WI
    Posts
    259
    Even if it is "just" a xr250 box it works good on the 400ex. I like mine and also had the same results as dragon

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