I checked the plug boots individualy and they where all OK. I am also not %100 that the coils are bad, but the wire powering the coil and the wires leading out to the points all check positive for continuity. I guess the coils I have are for a GL1100 because the wires are replaceable. Since I purchased them with a bunch of other parts I needed a while ago, the best way for me to check if the coil is indeed bad or not is to just replace and see what happens, not a major operation. Does any one have any tips on installing coils? It seems pretty straight forward aside from carving a bit of plastic so the tank fits back on. Does the positive to negative have any effect? I suppose they should work regardless of which side the power come in from. Usually power should go to the positive terminal I suppose.