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Thread: resistance of coil

  1. #1
    Join Date
    Jan 2017
    Location
    20 miles south of the hill north central new york stats
    Posts
    24

    Default resistance of coil

    hello and thank you for having me on your web site. PROUD 2nd owner of a 93 with 4700 mi/km. i have owned my vmax for about 10 years. i love it and only ride it in the utmost perfect conditions. very well maintained problem free tons and tons of smiles good laughs and fun had on this sled. everybody that knows me and my vmax learned to respect it yamaha fan or not most the hard way hahaha. it is what it is and i love it. on a short ride today when i started her up she fired right up banging on all 4 as usually. after a few minutes it started sounding like it was hunting going up and down rpm than back to all 4 then just 1 and 2 so on and so fourth. ran good getting to the trail between 4and 6000 rpm. got to the trail grabbed a thumb full and only 1 and 2 banging 3 and 4 no go. gently eased into a top speed condition it made it but not very smoothly it took a while. let off slammed a thumb full just 1 and 2 again. might be a bad coil can someone please tell me what my resistiance is going to be on my coil 1993 vmax4 stock. thank you so much . when can i post pictures? thanks again PETER

  2. #2
    Join Date
    Feb 2011
    Location
    milford
    Posts
    630

    Default

    Was it warm out. Mine fouled a couple of plugs and ran on two when it was warm and I was running slower tight trails

  3. #3
    Join Date
    Jan 2017
    Location
    20 miles south of the hill north central new york stats
    Posts
    24

    Default

    this sled has fouled about 3 or 4 plugs in 10 years. i always put fresh plugs in had the issue in various temps. usually my vmax is the last to get hot on warm days it takes alot the skidoos are always first to pull over.

  4. #4
    Join Date
    Jan 2017
    Location
    20 miles south of the hill north central new york stats
    Posts
    24

    Default

    i pulled the plugs to varify 3 and 4 wet 1 and 2 coffee color. just went through entire fuel system all new lines filters removed tank, pumps, carbs etc etc.

  5. #5
    Join Date
    Feb 2011
    Location
    milford
    Posts
    630

    Default

    Might be out of phase. Over rev. Or backfire

  6. #6
    Join Date
    Jan 2017
    Location
    20 miles south of the hill north central new york stats
    Posts
    24

    Default

    no no and no its an itermitant spark ted. outta phase no most certainly not never backed fired never over rev . resistance of a coil lets not over think it.

  7. #7
    Join Date
    Dec 2016
    Location
    Rochester, New York
    Posts
    10

    Default

    Go to 'general questions' forum. Scroll down to stickies section and there is a pdf service manual you can download.

  8. #8
    Join Date
    Jan 2017
    Location
    20 miles south of the hill north central new york stats
    Posts
    24

    Default

    i will check it out probably need the bench manual though.

  9. #9
    Join Date
    Feb 2011
    Location
    milford
    Posts
    630

    Default

    Ok. If you don't find it I have a manual and can look
    It up tomorrow.

  10. #10
    Join Date
    Dec 2016
    Location
    Rochester, New York
    Posts
    10

    Default

    Primary = .2 ohms.
    Secondary = 4.9 Kohms @68* fahrenheit. +/- 20%.
    Plug cap = 5 Kohms. +/- 25%.
    Last edited by Maximos; 02-18-2017 at 08:11 PM.

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