What electrical component is commonly used in the ignition kill circuit between each ignition coil in a V-twin engine?

In a V-twin engine's ignition system, particularly in the context of the ignition kill circuit, diodes play a crucial role. Diodes are semiconductor devices that allow current to flow in one direction only, thus providing essential electrical control in various circuits including ignition systems.

When installed between the ignition coils, diodes can help prevent back feed or interference between the ignition coils, ensuring that each coil operates independently and effectively. This separation is vital in a V-twin configuration where there are two ignition coils for the two cylinders. Using diodes in this way contributes to improved reliability and performance by protecting the coils from voltage spikes and ensuring that the kill switch function properly disables the ignition system when engaged.

The other components mentioned, while integral to various electrical functions, do not serve this specific purpose in the ignition kill circuit. Resistors are typically used to limit current or divide voltages, regulators manage voltage levels in a circuit, and capacitors store energy to smooth voltage fluctuations. However, none of these components provide the directional control and protective function that diodes do in this particular application.