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Yamaha Chappy LB50 No Spark

42653steve
in Yamaha Workshop

Featured Replies

Posted

I have a 1978 Chappy 50cc no spark. I have power to the wire that plugs into the wire to coil when I kick it over test light flashes. How can I test the coil still on bike without removing it? Thanks

  • Quote
    • Moderator

    ohms test, or you could connect the battery to the coil and then break the connection, that normally will cause the coil to spark if things are ok

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    • Like 1
    • Moderator

    yeah don't know the exact figures for a chappy but assuming it is a magneto type ignition the same as a DT175 then...

    Primary coil is about 1.0 Ohms to ground and the secondary HT coil is 5.9 K Ohm to ground (remove the plug cap to test this)

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    • Like 1

    As above, resistance testing coils is the way to go, don't have the exact figures to hand but they should be in your workshop manual 

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