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mechanical problem - help

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    mechanical problem - help

    At a recent track event, the bike started to sputter/gurgle, like it was missing some ignition cycles. Simultaneously, the gauges (tach and temperature - I don't run the stock speedo) were going crazy. It did this for a second or two then recovered. When it happened again a minute later, I pitted in.

    The temperature gauge was clearly no longer accurate, as it indicated cold at one point then nearly at the maximum. The bike seemed to start reliably, though, and I couldn't recreate the missing ignition problem in the pit. I went out for the last session and the bike was fine.

    Now, at home, I went out for a ride earlier and the problem returned. The bike died, and I couldn't get it to run. The starter turns, and the motor catches, but it doesn't continue to run. It just fires once or twice. As the bike is started, the headlights/turn signals flash and dim.

    I'm thinking it's either an alternator or voltage regulator issue.

    Any suggestions or comments?
    1989 Hawk, red
    TBR exhaust
    clipons

    #2
    Out of gas?

    I would go Alternator. Is your battery charging?
    BIKES: Honda: RC31 Racebike/ CRF 110 Mini Motard, DUCATI: 748
    Former MSF Rider Coach / Trackday Instructor/ Expert Roadracer #116
    "I'd rather ride a slow bike fast than a fast bike slow."

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      #3
      It has plenty of gas... I'm not sure if the battery is charging or not. I'm not sure how I can determine that if the bike won't start again.
      1989 Hawk, red
      TBR exhaust
      clipons

      Comment


        #4
        Probably a battery or wire harness ground problem, check all connections...
        J.D. Hord
        Keeper of Engine Nomenclature, 9th Order

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          #5
          Problem solved. It was the ground under the seat by the rear brake reservoir mount. It had been somewhat loose before, but I guess at some point it broke continuity. Half a turn with a 10mm socket fixed it, and yes, I tried disconnecting it and was able to recreate the problem.
          1989 Hawk, red
          TBR exhaust
          clipons

          Comment

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