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sputtering and backfiring - Gunson Colortune

Discussion in 'XJ Technical Chat' started by mmcgee, Jun 3, 2013.

  1. mmcgee

    mmcgee Member

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    Okay, I'm having a little trouble tuning my XJ700. The Gunson Colortune won't ever turn orange. It's blue with the mixture screws all the way in and nearly all the way out.

    The color changes a bit as I open up the screws and it flashes orange as the engines sputters and pops more. So I've sort tuned it by finding the place where the sputtering and popping stops.

    Obviously that's not very accurate. As a result, the bike takes forever to warm up and bogs down when I accelerate too fast, also there is still some sputtering and backfiring.

    Also, it warms up backwards from what I would think...when it's cold it idles very low and stalls easily. Then the idle rises as it warms. Shouldn't it idle high when cold and then drop down?

    Any thoughts?
     
    mmcgee, Jun 3, 2013
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