Before there was electronic ignition there were coils. Before coils there were magnetos. And before there magnetos there were…coils which trembled. And before tremblers there were hot tubes that combined with top-heavy bikes to make fires a daily hazard. Motor Cycling set out to introduce the first generation of motor cyclists to the intricacies of ignition systems. [Sorry about the ‘ohm’ pun, by the way, it’s 3.30am, I’m way past my best and I couldn’t resist it.