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Engine/EFI/Drivetrain

Discuss engine, fuel injection, air intake, and drivetrain modifications here
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TRX General Discussions

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Trending Discussions All Trending Discussions →
  1. TRX300 no or weak spark

    TRX General Discussions
    Hi all, I have a 1989 TRX300 4x4 which I am having spark issues with. At first I thought it was the ignition coil and have replaced that with a brand new one but still nothing. next step was the CDI. With the spark plug removed I can only get a weak spark when the starter button is first...
  2. 400ex PROPER VALVE ADJUSTMENT (i know theres a sticky, but something was left out)

    Maintenance / Important Information
    Here is a VID i made of what the right exhaust may look like if you dont take the decompression mechanism into consideration when adjusting... Here is the proper procedure, its also in my VID description.. THE CORRECT PROCEDURE TO ADJUST THE VALVES: 1. Remove the spark plug and both allen caps...
  3. Neutral safety switch?

    TRX General Discussions
    2007 trx90. The green neutral indicator light recently stopped coming on even when in the neutral position... After clicking the shifter up and down a few dozen times I can get it to come on and only then will the quad start. Is this a neutral safety switch issue or could it be something else
  4. Carburetor Basics ( Thanks to Saber6)

    Maintenance / Important Information
    Many people believe that carbs are very complex, but with a basic understanding of how carbs work, you will have no problem with performing your own carb adjustments. First off, there's 2 basic fuel related problems. You either have a rich mixture, or a lean mixture. A rich mixture is...
  5. 1990 honda trx300 fourtrax 2X4 no spark

    TRX General Discussions
    I've replaced the coil my old one barely tested 1 OHM, the new one tested about 4 I'm not getting anything to the spark plug, I replaced the CDI box, nothing so I plugged the 2 prong to the CDI box & tested the the 4 prongs cumming out of the CDI box I'm getting 12 volts out of 3 of them, my...
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