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Thread: Fuel, spark, compression, timing but won’t start

  1. #1
    Join Date
    Oct 2020
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    Fuel, spark, compression, timing but won’t start

    85 ATC 200x has proper cam and spark advancer timing, it’s getting fuel, has compression, and has nice blue spark but it still won’t start any ideas? I’ve checked everything with a multimeter and doubled checked everything but it wont fire over at all!

  2. #2
    Join Date
    Jun 2010
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    3,001
    Seems like you've tackled most things but could it be 180 degrees off on timing? Or maybe the woodruff key on the flywheel is spun a bit?
    Trikes
    1970/71 US 90 (Aquarius Blue)
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    1977 ATC 90 w/83 110 motor (Fugly)
    1982 ATC 70
    1983 ATC 70 (Ladybug)
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  3. #3
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    Oct 2020
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    Quote Originally Posted by coolpool View Post
    Seems like you've tackled most things but could it be 180 degrees off on timing? Or maybe the woodruff key on the flywheel is spun a bit?
    I’ll have to check the woodruff key is it left hand thread measuring clockwise to loosen?

  4. #4
    Join Date
    Jun 2010
    Location
    Cold Lake, Alberta, Canada
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    3,001
    Sorry, not familiar with that engine but a manual should clear that up if you have one. I suspect it's a right hand thread as I've had them off on a 70 and a 200 Big Red and that's what I've found.
    Trikes
    1970/71 US 90 (Aquarius Blue)
    1970/71 US 90 (Future Project)
    1972/73 US 90 Camo Project (110 Big Bore)
    1972/73 US 90 Green
    1977 ATC 90 w/83 110 motor (Fugly)
    1982 ATC 70
    1983 ATC 70 (Ladybug)
    1973 ATC 70

    1965 Marketeer 3 Wheel Golf Cart with 1986 Honda 250 drivetrain

    TF 2015

    Other
    1983 Honda Z50
    1978 Honda XL75

    Feedback http://www.3wheelerworld.com/showthr...ck-for-coopool
    http://www.3wheelerworld.com/showthr...k-for-coolpool

  5. #5
    Join Date
    Jul 2009
    Location
    South Florida
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    6,722
    Std threads , lefty loosely- righty thighty

    Btw their are no reverse threads on the 83-85 200x motors .
    86/87 200x their are though .
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
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  6. #6
    Join Date
    Jul 2016
    Location
    Kentucky
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    61
    Check valve clearance. Be sure you’re setting everything with piston TDC on the compression stroke. Take the plug out and hold your finger over the hole while you slowly turn it over. When it’s pushing air out of the hole you’re on the compression stroke.

  7. #7
    BarnBoy is offline Just Too Addicted Arm chair racerJust too addicted
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    Jun 2015
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    Check that your advancer is not 180° out
    That'll cause this issue....
    1984 HONDA ATC200M - OG, mid-restoration
    1981 HONDA ATC200 - future build
    1981 HONDA ATC185S - parts
    1984 ATC200X - roller, future build
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  8. #8
    Join Date
    Oct 2020
    Location
    South Carolina
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    Valves are good

  9. #9
    Join Date
    Feb 2016
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    Stellenbosch, South Africa
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    179
    Then it can only be your carb, take your air filter off and try spraying some quick start through the carb body so it reaches the cylinder, if it sounds like it wants to go after a few kicks, then you know all else is good you need to pay attention to your carb.
    1983 Honda ATC250R
    1983 Honda ATC200E BIG RED (sold)
    1984 Honda ATC200X (sold)
    1985 Honda ATC250ES BIG RED
    1985 Honda ATC70 x 2
    2001 Honda TRX90
    2004 Honda TRX300EX (sold)
    2008 Honda TRX250TM
    1976 Suzuki RV90M (sold)
    1967 Vespa Primavera 125
    1958 Massey Ferguson 35

  10. #10
    Join Date
    Oct 2020
    Location
    South Carolina
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    Tried starting it with no carb on and it still won’t start and I tried gas down the cylinder too which would rule out the carb if it ran

  11. #11
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    I still think it’s electrical. I know you checked the on off switch but I would put a meter on it and make sure it’s not shorting out

  12. #12
    Join Date
    Oct 2020
    Location
    South Carolina
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    Tried it with the kill switch unplugged, also when I kick the motor one time it sparks once and has a blue spark, shouldn’t it spark multiple times for one kick?

  13. #13
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Yes should spark many times per kick

  14. #14
    Join Date
    Oct 2020
    Location
    South Carolina
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    13
    Yeah what would cause that?, I tried a new spark plug, a Cdi and spark plug coil and wire from a running ATC 200x, pulse generator measures within ohm spec and so does the stator, stator put out 6-12 volts and when ohm testing it goes from 220 down to 216 over 10-20 seconds and then holds at 216

  15. #15
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Did you paint frame? Is the coil making a good ground where it bolts to frame?

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