spak plug head comes loose

Discussion in 'Motorized Bicycle General Discussion' started by dumpstercrusher, May 23, 2013.

  1. dumpstercrusher

    dumpstercrusher New Member

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    how do you keep ur spark plug head from poppin off from all the vibrations? my factory one i bought with the kit came loose and broke off so i ordered another from pistonbikes.com which was better quality and that ended up breaking off so i had to reorder a new one. i cant seem to ride this for a long time (20 mins?) before the plug head comes loose..
     
  2. CTripps

    CTripps Active Member

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    Switch to using a standard spark plug boot from NAPA or somewhere like it, and it should be fine.
     
  3. dumpstercrusher

    dumpstercrusher New Member

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    i don know if we have a napa around this area. hat about pepboys or advance auto parts?
     
  4. Mr. Minecraft

    Mr. Minecraft Visionary

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    They all should have it. Be careful though, I bought a plug boot and wire from oreily for one of my 2 strokers and it became brittle because of the heat, then basically disintegrated.
     
  5. JustAnotherBozoOnABike

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    you can get a spark plug wire at any auto parts store, any where, Napa, AutoZone, AutoPalace, any of them will carry spark plug wires.

    ...if you're on a budget you can also find plug wires at any junk yard.

    btw, the standard plug that comes with the kit has a thin, threaded tip and a non-standard boot that attachs to that tip so you can't use the standard plug that came with the kit with an automotive plug wire and you can't use the standard plug wire that came with the kit with an upgraded plug, if you upgrade you must upgrade both the plug wire and the plug.

    peace, bozo
     
  6. dodge dude94

    dodge dude94 New Member

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    Not entirely true. Most kits I've seen now have a little screw on cap on the thin rod which you were speaking of. The NGK B7HS I have also has this. You just leave the cap on to run a standard automotive wire.
     
  7. 2door

    2door Moderator
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    All spark plugs come with a threaded tip and cap on the top end. The kit plugs come with the cap removed so you can use them with that piece of junk boot that they give you. The very first thing you should do when you get your kit is throw that plug boot in the trash and replace it with an automotive quality boot. That will require that a new plug be used, one with the cap still installed.

    Almost without exception any wire you get from an auto parts store today will be resistance wire. It will not have a metal conductor so be careful when you install the new boot to make sure you have good electrical contact with the conductive core of the wire. You'll also need to use the same care when screwing it into the CDI wire post.

    You'll be better off if you can fine copper, or at least a metallic core spark plug wire instead of resistance wire. Motorcycle shops, lawn mower repair shops and some auto parts stores still carry metallic core wire.

    Good luck.

    Tom
     
  8. crassius

    crassius Well-Known Member

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    get an NGK LZFH Spark Plug Cap - it has zero resistance
     
  9. dumpstercrusher

    dumpstercrusher New Member

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    well comparing the plug i got in the kit and the pistonbikes.com plug, id say pistonbikes had a better quality with the boot. Felt secure, but ur saying the plug needs to be screwed onto the spark plug instead of just pushing it down till it snaps in?
     
  10. 2door

    2door Moderator
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    You need to go to an auto parts store and look at a real spark plug. You'll see the top is different in that there is a cap, about 3/16" in diameter on the top. The automotive plug boot I mentioned has a matching female connection that snaps onto a standard spark plug. Those kit plugs and plug boots are a joke. Get rid of them or you'll continue to have nothing but problems with them.

    The kit plug has a threaded portion that is supposed to snap into the kit boot. It is a bad electrical connection prone to failure and poor engine performance. Do not order plugs or plug boots from engine kit suppliers or you'll get the same parts and be back to square one. Replace both with good automotive quality parts and you can forget about spark plug problems.

    Tom
     
  11. dumpstercrusher

    dumpstercrusher New Member

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    sweet, thanks! ill def n try to go look at some tomorrow. Also does it matter what size spark plug i can use? Bikeberry had a spark plug that was much bigger for an easier start up
     
  12. CTripps

    CTripps Active Member

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    The main thing that matters with the plug is that it doesn't extend too far into the engine. You don't want the piston smacking into the bottom of the plug. Bad things can happen then.
     

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