Home / Avionics / Instruments & Gauges / Tachometers / Rotax, Tach 2-1/4 Inch CDI Rotax, Tach 2-1/4 Inch CDI$124.95 Rotax, Tach 2-1/4 Inch CDI quantity Add to cart SKU: INTA140 Category: Tachometers Description Description All Rotax 2 Stroke engines with CDI ignition. Connects to the gray wire and to ground.