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Ignition question

Discussion in 'XJ Technical Chat' started by tabaka45, Apr 2, 2012.

  1. tabaka45

    tabaka45 Well-Known Member

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    '85 xj 700 with 10600 miles. No idea what maintenance the po did, but the bike seems to be clean and in good condition. The bike developed a skip and rough idle which I corrected with new spark plugs and clean carbs. However, I decided to check the plug wires, although they look new. Started the bike and turned off the lights to look for any arcing and saw none. However, when I used a screw driver and touched the wire and then the engine I got a very small spark on three of the wires. I then misted the wires while running and still didn't see any arcing. The bike runs well, I just wondered if anyone has ever seen this with their bikes.
     
    tabaka45, Apr 2, 2012
    #1
  2. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Make sure the plug caps are tight (they screw into/onto the wires.)

    At 10,600 you'd BETTER check the valve clearances and soon. If they've never been checked, you're getting close to disaster. They only get tighter...
     
    bigfitz52, Apr 2, 2012
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  3. Hvnbnd

    Hvnbnd Active Member

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    I once had a problem with just 1 plug, it seems the wire unscrewed from the connector, but it was hidden under the rubber boot.
    I screwed it back on nice and tight and BINGO! it's all better!
     
    Hvnbnd, Apr 3, 2012
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  4. tabaka45

    tabaka45 Well-Known Member

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    Doing the valves this weekend, then the brakes. The po was pretty good with maintenance, so I suspect the valves have been serviced on schedule, but I'm taking no chances. All my plug boots were on securely, so I can only assume that I had a bad plug or one of the wires was arcing.
     
    tabaka45, Apr 3, 2012
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