to check your coils do this: remove the spark plugs from the engine and plug them back on the plug wires, make sure your plugs are grounded to the engine. remove the wire that goes from the harness to the coil, the one that is supposed to initiate the spark. Take a jumper wire from the +12volt side of the battery and touch it momentarily to the spade connector that you removed the wire from on the coil. You should see a spark at the spark plug, if you don't see a spark make sure the coil is grounded properly. If it still doesn't work, check the resistance of the coil to the specification. If it doesn't meet the spec, your coil is bad. You do NOT need to have the key on or hit the starter to do this test. If your coils are sparking then you'll need to follow the wiring back to the CDI and key switch and make sure the CDI is getting power. Check the connectors, sometimes a wire can break right at the connector and go unnoticed.