I went down to a friends shop to install a tach on one of his customer's bikes that he was having problems with. 2004 Victory Vegas, Baron tach. The Victory has a single-fire ignition and the Baron tach requires a converter to be wired into the circuit. We had the tach and the single-fire converter and wired everything up per the instructions - Tach lights up, but taky no worky. Called Baron and they told me that if I got it to work on a Victory, I would be the first one to do it. They didn't know why it won't work, it just doesn't. There is nothing I can see in the ignition circuit that would prevent it from working. It has two wires going to each coil, a common positive and a negative for the front coil and one for the rear. The coils are in a constant state of charge until they receive their negative signal which discharges the coil to the plug and bang the plug fires. Baron said they had called Victory to ask what they are doing different that their tachs won't work on Victory bikes. Victory said they sold a tach for their bikes and had no interest in helping any competition. I guess I can understand their point, what I can't understand is that an ignition circuit is not rocket science but I am stumped as to why it won't work Any ideas???