I’m somewhat of a noob when it comes to more advanced electrical systems, so excuse my ignorance.
I’m trying to build a tachometer for my motorcycle, a 1982 Yamaha Virago 920 (V-twin, two ignition coils). On one cylinder, two fires happen per engine revolution (wasted spark ignition). To trigger the spark, the TCI switches (disconnects) ground on the appropriate cylinder’s ignition coil, then reconnects it.
I’m sure there are terms I’m missing that’s making this really difficult for me to research, but how would I check the frequency of these fires? What kind of complications might I run into when doing so?
Any help is appreciated!