Tomos A35 no spark

Discussion in 'The Workshop' started by scubabiker, Jan 23, 2019.

  1. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    Can I borrow the hive mind of the forum?
    My newly rebuilt tomos is STILL not sparking.
    I suspected the coil/cdi (its a vespa one). But just tried 2 others and still no joy.

    Ive checked the voltage from the ignition coil on the stator, the ignitor pulse coil and ive bypassed the ignition switch.
    So to sum up:

    Voltage to coil/cdi.
    Ignition pickup.
    Good earth.

    What am I missing here?
     
  2. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    Red is AC from coil windings. Black and white are the hall effect sensor.
     

    Attached Files:

  3. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    Ok. Fixed it.
    I put the spacers wrong on the pickup hall effect sensor.
    It was enough for the sensor to create a pulse, but not enough for the cdi to make a spark.
    Funny, measured it with a multimeter...
    We all make mistakes huh?
     

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