Posted January 17, 20178 yr 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
January 17, 20178 yr 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
January 17, 20178 yr 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)
January 22, 20178 yr 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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