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Help, weak spark
Posted: Tue Jan 15, 2019 1:29 pm
by Wracer
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
Re: Help, weak spark
Posted: Tue Jan 15, 2019 2:55 pm
by Wracer
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.
Re: Help, weak spark
Posted: Tue Jan 15, 2019 7:30 pm
by Aussiecrf230
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.
Re: Help, weak spark
Posted: Tue Jan 15, 2019 7:47 pm
by Wracer
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.
Re: Help, weak spark
Posted: Wed Jan 16, 2019 6:13 am
by Back2-2
From what you just described - I suspect you fried your ignition module.
Re: Help, weak spark
Posted: Wed Jan 16, 2019 8:14 am
by Wracer
The computer?
Can I put in one from a 2006 crf250r?
Re: Help, weak spark
Posted: Wed Jan 16, 2019 8:16 am
by Wracer
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?
Re: Help, weak spark
Posted: Wed Jan 16, 2019 11:51 am
by Wracer
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
Re: Help, weak spark
Posted: Wed Jan 16, 2019 1:06 pm
by Back2-2
I would look for a used ignition module on ebay or Cl.
Re: Help, weak spark
Posted: Wed Jan 16, 2019 5:33 pm
by Wracer
Can’t find any on eBay
Re: Help, weak spark
Posted: Wed Jan 16, 2019 5:57 pm
by Wracer
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
Re: Help, weak spark
Posted: Wed Jan 16, 2019 7:43 pm
by Wracer
Anyone?
Re: Help, weak spark
Posted: Wed Jan 16, 2019 10:20 pm
by Aussiecrf230
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.