But didnt do anything for the reason that it is wet and black I take it? if you look at the newer plug after a few more kicks you will probably see it is wet again. remember what a wet plug looks like, and that those are caused by getting too much fuel into the cylinder. some call that flooding. now you need to find the reason it flooded. usually it is caused by a bad float setting or some bad parts (ie float needle, seat, or floats themselves.) My guess is that no one that has owned your bike who knows you ever set the float and taking it apart to inspect that, setting it, and making sure it is reassembled correctly would be a good start. you may have to drain the fuel that has accumulated in the crankcase of your engine in order to keep it from flooding and not starting even after you have attended to the reason that it didn't start. Sounds like you were going to apply yet another "bandaid" with the jet change.