Results 1 to 16 of 16

Thread: ATV Mehcanic out there Need Help???

  1. #1

    ATV Mehcanic out there Need Help???

    Any ATV mechanics out there need help with 1978 ATC 70
    It will not fire It will fire when I hold the coil wire and pull the rope but will not fire otherwise
    Need help Thanks in advance Jim

  2. #2
    Join Date
    Dec 2009
    what wire on the coil? There is a trigger wire, which is probly coming from the points(may have a cdi, but i think it still has points in 78). A ground wire. And then the secondary(spark plug wire).

  3. #3
    It has a wire coming from the points it connects straight to the coil
    The big wire going to the spark plug

    When I pull the rcoil starter it will shock me (big time) bui will not fire the spark plug

    You are correct points only I have changed them and set the new ones

    We rebuilt the engine it ran good My son stripped the 70 down to repaint etc after he put the bike/plastic back on it has never fired

    Help is appreciated Thanks Jim

  4. #4

  5. #5
    Join Date
    Dec 2009
    Did you try a different spark plug?

  6. #6
    several different ones and also plug caps

  7. #7

  8. #8
    Join Date
    Dec 2009
    That doesnt make sense. How do you know it's not firing the plug? did you ground the plug to the cyl head when you checked it? will it(the coil) fire a spark checker? does the boot snap on to the plug firmly? Is there a ground that you forgot to re-install? mabye its not a spark issue? mabye you have a fuel problem? Just throwing out possiablities

  9. #9
    No fuel problems that is what I am trying to trace down I am grounded so when I hold the wire I get shocked Yes tried new spark plug cap no fire but when I put my finger in the cap guess what shocked again
    I am open for all suggestions
    Thanks Jim

  10. #10
    Yes I did ground the plug

  11. #11
    Join Date
    Jan 2006


    stick a screwdriver in the sparkplug cap,hold it about 1/4" from the head while pulling the cord & see if it fires.spark from the screwdriver to the head.

  12. #12
    I tried that also no fire I am really puzzled

  13. #13
    One correction it a 1985 ATC 70 Got to be a mechanic or 2 out there as large as our forum is
    Thanks Jim

  14. #14

  15. #15
    Join Date
    Jul 2009
    Pocono Mountain -Long Pond, PA
    If your holding the wire and getting shocked and there is no spark on the plug then you have a broken wire and its sparking somewhere else.Hook everything back up and when its dark,try to start it.You will see where the spark is.
    '10' Elite Judge
    '09' Elite GT 500
    '08' Mathews DXT
    Harvest Time Archery Shooting Staff

  16. #16
    Join Date
    Jan 2010
    San Diego
    When your son stripped down the frame and painted it did he make sure to scrap/sand the paint off any part of the frame that ground wires attach? Check the kill switch as well.

    If you hold the plug wire at a certain angle and it shocks you try holding it at that same angle and use a screw driver to ground it to an unpainted part of the motor. You might just have a broken plug wire coming out of the coil.

Similar Threads

  1. who has a atv
    By srkundell in forum Bowhunting and Bowhunter Showcases
    Replies: 70
    Last Post: May 24th, 2010, 12:26 PM
  2. Looking into first ATV...
    By GuyWithBow in forum ATVs, Motorbikes, and Motor vehicles
    Replies: 12
    Last Post: May 8th, 2008, 10:15 PM
  3. ATV or not ATV
    By 660 Grizzly in forum Bowhunting and Bowhunter Showcases
    Replies: 28
    Last Post: July 8th, 2004, 05:39 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts