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  1. #1 250 motorcycle plug wire at the coil replacement 
    C-Moto Regular
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    My mototrcycle is having trouble with the coil and has lost spark, I've ordered a new one but was wondering if the plug wire will come out of the small coil with two wires and the plug wire is in the back, it has a boot on it and isn't sealed tight from moisture so I was assuming it does, but haven't tried it. I think that is where the spark is failing. I'd guess rust, the boot is all ozone damaged.

    Thanks,
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  2. #2 Re: 250 motorcycle plug wire at the coil replacement 
    Danger, Will Robinson! Lao Jia Hou's Avatar
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    Sounds possible that the connection is failing or, also possible, that the voltage is grounding out through/around the damaged cap (happened to me on an old car). It doesn't have to be visible damage for a wire to fail, entirely or partially, but visible damage points in the direction of a faulty plug wire.

    When you say "lost spark", do you mean that there is no voltage coming out of the plug's end of the wire?
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  3. #3 Re: 250 motorcycle plug wire at the coil replacement 
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    Yes lost spark, the engine turns off like flipping a switch. Happen last night about a mile from home. Thought it was fixed. I redid both ends of the plug wire. The cap's screw at the spark plugs end twists when you apply to much force. But I think your right I need to replace the plug wire too $2 for 2 feet at the motorcycle shop. I ordered a performance coil, orange coil and wire from Ebay, suppose to be much better, it said. But after I ordered it I read somewhere else that other parts need undating when you upgrade the coil. But read here someone upgraded the coil and liked it.
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  4. #4 Re: 250 motorcycle plug wire at the coil replacement 
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    I also tested the plugs end of the wire and no there was no spark.
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  5. #5 Re: 250 motorcycle plug wire at the coil replacement 
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    I first replaced the plug wire while I wait on one comming from Ohio via Ebay, and it ran and ran pretty good for the NAPA part that was probably for a high performance lawn mower. The plug wire did the trick. So my coil made it yesterday and I installed it today, it worked and worked perfect. It's a high performance coil and aint sure if my cdi is going to need upgraded since I put this on, but it's suppose to do better in the rain and cold. But I'll have a spare coil just incase I want to revert it back to the old coil. I think it was the coil spark plug wire the whole time.

    Thanks for all the help.
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