What does the instruction mean by 1 and 2 pulse calibration?
You can consider our tachometers to be frequency counters, counting pulses from the ignition coil. Different bikes will produce different numbers of coil pulses per revolution of the crankshaft. Here are some general rules: American V-twins will almost always be 1-pulse regardless if the ignition is referred to as dual or single fire. Some Japanese V-twins may be 1/2-pulse, requiring special factory calibration. An example of this is the Honda VTX. Many Japanese multi-cylinder bikes with dual coils will be 2-pulse. Some newer bikes have a coil on-plug ignition. Give us a call for specifics if you have one of these, or use the Contact Us link a click and send us an email.
