Normally, Church of MO features are all about motorcycle reviews we've done from a time long, long ago. It's fun to take a trip back in time to see what we thought about yesteryear's motorcycles back when they were new. Today's Church feature is a little different. Today's motorcycles are basically sophisticated computers on two wheels. Making them go faster or perform better is less the result of turning a wrench, and more a product of pushing a button on a laptop. But tuning via computers instead of wrenches isn't a new concept. As proof, we take you back to the year 2000 and this ECU module to improve the performance of... a Harley-Davidson Dyna. Although the Dyna was carbureted, playing with spark and altering when the air/fuel ratio goes pop compared to what the factory says is still a staple of tuning today.