Gy6 scooter not starting!

Discussion in 'The Workshop' started by shaun k, Sep 1, 2020.

  1. shaun k

    shaun k New Member

    Messages:
    1
    Friend has a gy6 50cc scooter.

    (Kymco assassin 4 stroke)

    Not starting for some reason off kick-start or electric.

    Has spark and has a new vacuum fuel petcock.

    Does anyone know what i can be checking to diagnose?

    Or is there any common issues?

    There is fuel in the block because can see it on the spark plug.

    Maybe not enough fuel I dont know? (With it being a vacuum system fuel won't get through without it running i believe?)

    Please help
     
  2. Shunty

    Shunty Member

    Messages:
    172
    Rides:
    Baotian BT49QT-9
    Maybe carb needs to be cleaned out
    ignition sensor to flywheel needs gaping
    Have you made sure the petcock works ?
    This will work when turning over to start so check by sucking on vacuum pipe to see if fuel runs out of fuel pipe.
    Check plug gap as well
     
  3. MARSH

    MARSH Whooooo!

    Messages:
    3,200
    Rides:
    Piaggio Typhoon
    Check compression while cranking over, 50cc Kymcos had problems with valve clearance, not a problem but too tight from factory. to tight and carbon build up on valve seat, check valve clearance.
     

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