Coil Conundrum

So, resistance across the primary windings is about 3 ohms. Across the secondaries, I get nothing, as in infinite resistance. This indicates blown coils, does it not? Funny thing is that the bike runs. On two cylinders. The two that use the obviously cracked coil. :huh:

Try this:

Primary(small wires) side of the coils will read between 1.8 to 3.0 ohms.

Secondary(sparkplug wire ports)side of the coil will read between 10.4K to 15.6K ohms. These ports are wired together, so it makes no difference which is used, as long as the correct coil to sparkplug configuration is followed.

The sparkplug caps should read 5K OHMS, any higher, or a reading of infinity means new caps should be ordered.

To stress the ignition coils, take a hair dryer, heat the coils and see if the ohm readings change from cold to hot . If they do, it’s time to buy new coils.

Also you'll need to change the range of your meter to read the higher ohms of the secondary ports(where the sparkplug wires go.