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Thread: picked up an 84 atc70 for 40$ bucks ! need help.

  1. #1
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    picked up an 84 atc70 for 40$ bucks ! need help.

    picked up an 84 atc70 . from a guy cleaning out a garage.

    its all complete but needs a restoration . its a bit rusty has one flat . but its totally saveable with some powder coating and maby even a lifan .

    anyway I'm not looking to start this project right away and I'm trying to get it running to messaround on .

    the problem is it has spark that comes and goes . I had it fired up for about 20 seconds.

    what would cause that ? I cleaned the points and flywheel .

    thanks for anyhelp !

    ill ppost some pictures soon
    84 200s almost done
    84 atc 70 project

  2. #2
    Join Date
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    Check the ground, it may not be as good, specially if it's rusty. It could also be the points. Hope you get it to run soon.

    TORKER.
    THOSE WHO SAY IT CANNOT BE DONE, SHOULD NOT GET IN THE WAY OF THOSE BUSY DOING IT...

  3. #3
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    well i got it running and it was a ground issue thanks .

    issue number 2 is it backfires . and shifts into gear but dosent move . it creeps very slowly and the engine bogs down ?

    clutch or centrifical clutch ?
    Attached Thumbnails Attached Thumbnails 018.jpg   019.jpg   017.jpg  
    84 200s almost done
    84 atc 70 project

  4. #4
    Walkerallen's Avatar
    Walkerallen is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    try adjusting the clutch, and for the back fire, make sure you exhaust isn't plugged

  5. #5
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    Dude that was a steal. i just missed a 78 in about that shape for 100 bucks. Good find, and good luck restoring.

  6. #6
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    thanks ! i bet the exhaust is plugged . the exhaust is rotted to hell. along with the chain and brake drum covers .lol

    it seems to rev up fine in neutral other then the backfireing
    84 200s almost done
    84 atc 70 project

  7. #7
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    could it be the timing? that would explain the backfire and no power. jim
    81 185s
    82 185s with 85 200s motor
    82 185s
    and a 72 ct70

  8. #8
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    would worn out points even when set to proper gap cause it to be out of time ?
    84 200s almost done
    84 atc 70 project

  9. #9
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    Nice score, thats a solid looking 70

  10. #10
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    Nice score, fenders look great!

    As for your problems, it could be anything from a plugged up exhaust, a fouled spark plug, or even a dirty carburetor. I would take the exhaust off and swap it for something else if possible, swap in a new plug, and take the carb off and really thoroughly clean it. My 200x was backfiring pretty badly when I let off the throttle, so I cleaned out the carb, and put a new plug in, and it's running like new

    That would also be a great project too. A little polish, maybe some sandblasting and powdercoating, and it'll be a sweet ride

    It's going to be hard to kill that engine......
    LED obsessed
    2015 Yamaha FJ-09

  11. #11
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    The carby more than likely needs a clean and filters on the fuel lines wouldn't be a bad idea as the tanks are quite often full of rust. New points and condenser would be a good idea to as worn points can cause the timing to be out even when set to the correct gap
    '73 K0 '110' ATC 70 (Frankentrike)
    '78 ATC 70 (Restored)
    '79 ATC 70
    ATC 70 Full Suspension Project (Under Construction)
    '03 Rodeo (D-Max) 4WD

  12. #12
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    i cleaned the carb and put a fresh plug in . im thinking its the points also.

    i wasnt going to start this project soon. but after lookin at some piks on hondaatc70.com i think its time to get the project rolling.

    the only parts too far gone are the brake hub covers , chain cover and the axle is too far pitted to make pretty again.

    short list . powder coat frame and fork (oem colors) . chrome all the chrome . complete sticker kit . douglass rims and holeshot tires . big bore kit . maby a blue honda 70 seat cover .

    anyone have any feedback on this kit ?

    http://www.tboltusa.com/store/vintag...70-p-1338.html
    84 200s almost done
    84 atc 70 project

  13. #13
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    Holy cow what a steal, you lucky dog you!. lol

  14. #14
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    For that kind of money for a stroker kit, I would think about pulling that motor out and throwing a lifan in... Dont have to beat that little honda motor, and when the lifan is dead, throw it away and put the 70cc back in... (just me though)
    No trikes. Too old, too crippled. Unless I find one I can't live without!
    "You cant fix stupid" ~ Ron White
    My feeback link: http://www.3wheelerworld.com/showthr...ack-for-Thorpe

  15. #15
    PAPA250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    what's the going rate for a 140cc lifan ?

    I seen a web site with one for 400 ?

    that's pretty cheap. I would defenetly get one of those over a kit
    84 200s almost done
    84 atc 70 project

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