I was servicing my bike today for the first time since I bought it. (replacing the spark plugs and doing an oil change) And when I was draining the oil I noticed that the plug was quite difficult to get moving at first, then it kind of "broke" and started to thread out. After I let it drain and removed the old oil filter I was having a hard time getting the plug to come all the way out (felt like it was just stripped, until it finally did. When this happened I felt around the tip of where the plug threads in and there are all these metal shavings, so I'm pretty sure the last person that did a change fucked the inside threads. There was also a little bit of metal shavings in the actual oil coming out, which is scary as hell. I think it might just have occured due to the fact that someone like JB welded the threads back in when the plug wouldn't go back in? I don't know, but all I know is the plug won't thread back in, and the plug itself is completely undamaged. Does anyone know how I can tackle this problem? The bike is my main mode of transportation, and I have no idea how to solve this occurance. I think I have to re-tap the threading larger and find a bigger plug? Someone please help me with this, I have no idea... HELP.