Just bought a 1977 sportster. Previous owner said i needed a coil to run. Bought a new coil and installed it, still won´t start. There is power at the orange wire on the left side, but not sure if there should be power on the black wire on the right side. There is no spark being delivered to the spark plugs, and the plug wires seem to be ok(I checked them with a Ohm meter). Any help would be greatley appreciated.