Help, weak spark
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Help, weak spark

    by Wracer » Tue Jan 15, 2019 1:29 pm

    i got a 2004 crf250x, and it has weak spark.
    This all started because the gauge display wasn’t lighting up. I unplugged the coil and ran power to the blue/yellow wire which also has the red wire for the display.
    Long and short of it is the bike has very weak spark now, won’t fire up
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Tue Jan 15, 2019 2:55 pm

    So the bike seems to have spark.
    It’ll crank over, seems to fire, runs for a rotation or two then quits.

    Bike ran perfectly fine before I put power to the display red wire, which is also the black/yellow coil wire.
  • Aussiecrf230
    Posts: 1573
    Joined: Fri Jan 06, 2006 11:11 pm

    Re: Help, weak spark

    by Aussiecrf230 » Tue Jan 15, 2019 7:30 pm

    How have you determined the spark is weak?
    Have you checked all the connections?

    If you can get it to fire and run only a short time it could be a fuel issue like a partially blocked pilot.

    Was it starting perfect just before you worked on the display or have you not run it for a while.
    The age of the fuel can also affect starting.

    Not saying it is not a spark problem, just I know starting issues can have many or multiple causes.
    Ray
    Australia

    CRF230F 2004
    C30F Power Up needle
    Mains 132
    Idle 45
    2 turns out
    Baffle out, Screens In

    It starts,it runs,it gets to where all CRFs can get to without the valve or valve plate dramas
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Tue Jan 15, 2019 7:47 pm

    It ran fine 5 minutes before I worked on it.
    I stated it, I notice the display/gauges wasn’t illuminating. So I ran 12v power to the black/yellow wire at the coil, which is where the display gets its power from. The coil was disconnected. I think I heard a snap. (Thinking electrical snap/short)

    I tried to start it, it usually starts right up.
    But this time it didn’t. I pulled the spark plug and the spark was so weak when cranking, I touched it, no shock. Kept cranking it, after 30 seconds got a shock.

    This is the wire I put 12v to.
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  • Back2-2
    Posts: 761
    Joined: Tue Jan 04, 2011 3:31 pm

    Re: Help, weak spark

    by Back2-2 » Wed Jan 16, 2019 6:13 am

    From what you just described - I suspect you fried your ignition module.
    Neil
    Black Hills of SD
    Life without Motorcycles would just be boring, really boring
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 8:14 am

    The computer?
    Can I put in one from a 2006 crf250r?
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 8:16 am

    I have a 2006 crf250r computer, but it just has plugins.
    Mine has wires coming out of it, and plugins at the end of the wires?
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 11:51 am

    I actually have a flywheel, magneto, cdi, and harness from a 2006 crf250r.
    Not sure if one part or all is interchangeable.
    I’d like to keep my lights, but I guess their not absolutely necessary
  • Back2-2
    Posts: 761
    Joined: Tue Jan 04, 2011 3:31 pm

    Re: Help, weak spark

    by Back2-2 » Wed Jan 16, 2019 1:06 pm

    I would look for a used ignition module on ebay or Cl.
    Neil
    Black Hills of SD
    Life without Motorcycles would just be boring, really boring
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 5:33 pm

    Can’t find any on eBay
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 5:57 pm

    This is the number on my cdi,
    071000-2530

    Now, will a crf250r cdi plug into my harness and work
    Or
    Would I be able to use a flywheel, stator, wire harness and cdi off of a 2006 crf250r?

    Any info appreciated.
    Thanks
  • Wracer
    Posts: 15
    Joined: Tue Jan 15, 2019 1:22 pm

    Re: Help, weak spark

    by Wracer » Wed Jan 16, 2019 7:43 pm

    Anyone?
  • Aussiecrf230
    Posts: 1573
    Joined: Fri Jan 06, 2006 11:11 pm

    Re: Help, weak spark

    by Aussiecrf230 » Wed Jan 16, 2019 10:20 pm

    I would suspect the 250x stator would have a charging or lamp coil that the 250r stator does not have. You would have to check the wiring diagram for both to be sure.
    Ray
    Australia

    CRF230F 2004
    C30F Power Up needle
    Mains 132
    Idle 45
    2 turns out
    Baffle out, Screens In

    It starts,it runs,it gets to where all CRFs can get to without the valve or valve plate dramas

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