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Thread: 07 400ex wont start??

  1. #1
    Join Date
    Aug 2009
    Posts
    90

    07 400ex wont start??

    i have 07 400ex for a while i lost my key so i put a 04 wire harness on finally i found my key and now i put the 07 harness back on its just cranks and cranks but wont turn over. the problem actually happened with the 04 wire harness i was riding it shut off and now it just cranks and cranks thats why i decided to put the 07 harness back on to see if that was the problem but its doing the same thing it just wont start up

    if you have any ideas of what it could be letme know thanks

  2. #2
    Join Date
    Aug 2011
    Location
    Tampa Fl
    Posts
    515
    Check ground wire?
    WWW.2strokecentral.com

    86 Yamaha moto 4 stock 80cc

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  3. #3
    Join Date
    Aug 2009
    Posts
    90
    ground wire from coil right?? if so then yeah thats fine

  4. #4
    Join Date
    Mar 2010
    Posts
    428
    you didn't hit your kill switch did you???
    2004 YELLOW TRX400EX
    15/39 Sprockets, 2005 Lower End, 22X11x9 GBC X-Rex,
    23X8X10 Interco Swamp Lites, 250X Clutch Cable,
    Aftermarket Swingarm Skid Plate,
    DG Headlight Guard, Moose Racing/DynoJet Jet Kit,
    Moose Racing Bars, Moose Racing Aluminum Hand Guards,
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    Moose Racing Muffler Packing, Pro Armor Tether Kill Switch,
    Sintered Brake Pads, Team Alba Pro Elite Nerf Bars,
    White Brothers R4 Slip on, White Bros Air Box Vents,

  5. #5
    Join Date
    Aug 2009
    Posts
    90
    no kill switch is also fin i put a new one on anyway.

  6. #6
    Join Date
    Jan 2010
    Location
    fitchburg Ma
    Posts
    3,267
    is it getting spark?

  7. #7
    Join Date
    Dec 2010
    Location
    Terre Haute Indiana
    Posts
    133
    if it cranks then your circuit isnt broken, check and make sure the coil is plugged to the spark plug good and check that ground. Otherwise make sure the plug isnt completely fouled and pump it while it tries to start
    2002 400ex
    Wiseco 416 11:1 piston
    Sparks 8 plate clutch kit
    Stage 2 hot cam
    CRF450 Timing Chain
    HMF full system
    Kenda Bear Klaw rears
    Dynojet kit
    K&N Air Filter
    Precharger, no aiirbox lid
    MSR Bars

  8. #8
    Join Date
    Aug 2008
    Location
    Central NJ
    Posts
    11,326
    Did you put the 07 cdi back on?
    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!

  9. #9
    Join Date
    Aug 2009
    Posts
    90
    yes, the 07 cdi is hooked up. when i had the 04 harness on i used the 04 cdi.

  10. #10
    Join Date
    Aug 2009
    Posts
    90
    ive been working on it all morning. still nothing i even put a brand new coil on i pulled the plug and put it to something metal and it sparks so im guessing it has spark. the headlight comes on also.
    ive been using jumper cables hooking it up to my truck to the quad becsause battery is dead

    the gas is on reserve? there not alot in there

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