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Thread: 1981 ATC 185S Carbon Fouled Plug

  1. 04-02-2005, 11:55 PM #1
    ROBTHEROD
    ROBTHEROD is offline New to the board Arm chair racerNew to the board
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    1981 ATC 185S Carbon Fouled Plug

    Ok The atc only has about 3 hours on the rebuilt motor. The problem is its fouling the plug over and over again. The carb has been rebuilt and has the stock 95 main jet in it. I tried ajusting the needle jet to the lean out the carb but that didn't help. Then I tried ajusting the float to make it leaner and that didn't work. The plug is still carbon black and fouled. Timing is on and the valves are set right, Pulse generator and coil are fine, air gap on pulse is set right. idle and pilot air set right. Any body got any ideas

    Thanks

    Rob
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  2. 04-03-2005, 12:55 AM #2
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    hotroddal
    hotroddal is offline Just Too Addicted Arm chair racerJust too addicted
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    do you have a dirty air filter, i suggest cleaning it out if its dirty- just an idea.
    my trikes:
    1983 honda atc 200x-k&n filter
    2002 yamaha raptor 660r, yoshimura slip on, prm grab bars
    1978 chevy nova, 454 v8, bds blower, 150hp shot of nitrous, full roll cage, a real power house.
    1991 chevy s10 4x4 350v8.
    1986 250sx
    YES its fast NO you cant ride it.
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  3. 04-03-2005, 01:03 AM #3
    ROBTHEROD
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    Its clean.
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  4. 04-03-2005, 09:44 AM #4
    350red
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    check your stator coil under the flywheel, it might not be real strong, and giving you weak spark,
    Thanks, Sam
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  5. 04-03-2005, 01:14 PM #5
    ROBTHEROD
    ROBTHEROD is offline New to the board Arm chair racerNew to the board
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    I check the stator coil and it read 185 ohms but it look new. Could this be the problem?
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