Coil problem

Discussion in 'FXR Models' started by Pete71, Jan 25, 2016.

  1. Pete71

    Pete71 Member

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    How do i know what type of coil do i have , is there anyway i can see if its for Singlefire or dualfire coil?
    Only numbers on it are 31609.80 and 0812 theres no manufactorlaber or anything on it :/
     
  2. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    31609.80 is the stock OEM coil from Harley.
     
  3. Jack Klarich

    Jack Klarich Expert Member

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    Check primary resistance by connecting your ohmmeter between the screw posts that the wires connect to. Stock coil is between 2.5 to 3.1 ohms.

    Check secondary resistance by connecting your ohmmeter between the spark plug towers. Stock coil is between 10,000 and 12,500 ohms.
    Check your coil first
     
  4. Pete71

    Pete71 Member

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    Ok. thx guys for the replys...
    I bought this bike as a Project but no one know the history of it so its abit hard to find out what parts its made of, there was no ignitonmodule on it so thats why i was asking if theres any way i can check By the coil. but didint it came out as stock with dual fire?
     
  5. Jack Klarich

    Jack Klarich Expert Member

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    What year and model?
     
  6. Pete71

    Pete71 Member

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    -91 fxr
     
  7. tourbox

    tourbox Senior Member

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    Should be Dual Fire Ign.. Another way to check your coil for single fire or dual fire is look at the small post to connect the battery & ign. wires to. If you have 2 post =dual fire, 3 post=single fire.
    If you have 2 coils then single fire.
    tourbox
     
  8. Pete71

    Pete71 Member

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    thx, so it seems to be a dualfire coil
     
  9. Jack Klarich

    Jack Klarich Expert Member

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    Any after market dual fire coil will work, does not have to be HD
     
  10. Jack Klarich

    Jack Klarich Expert Member

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    # 49 wo[​IMG]uld be an ignition module for your bike