The Motorcycle Ignition Tester has the ability to test several different combinations of ignition setups. It will work on 4-cylinder, 2-cylinder, single cylinder four-strokes, and MSD Pulse ignitions. Different test programs can be selected by pushing the button on the front of the unit. The Tester can also be programmed to check the accuracy of your tachometer or rpm-activated switches for a variety of applications. This is a grat tool to test your MC-4 or your Nitro Hraley ignition BEFORE you start it!