87170 RPM Induction tachometer drive

This Daytona RPM induction tachometer drive provides a reliable method for capturing engine speed data on motorcycles lacking a factory electronic tachometer output. The sensor functions by detecting an RPM pulse directly from the spark plug wire or the ignition coil, translating the physical ignition sequence into a signal for the gauge. It is an essential component for Harley-Davidson owners installing aftermarket Daytona tachometers or custom instrumentation. The simple induction-based design allows for a clean installation without the need for invasive wiring into the main harness. This drive unit ensures accurate readings across the rev range, making it a practical solution for performance monitoring on custom builds. Sold individually.