Ayup, i noticed the other day when i started the bike up it ran erratic ie miss firing it had done this previously but seemed to clear it self once warm, so put it down to the fact im not using the bike and the fact its been in pieces, however this time it did not clear so i thought id remove plugs and 1 2 3 fine no 4 turned and turned without any resistance ie only finger tight and when i pulled the plug socket out this came out .
The plug leaving the thread in the head oh shit this is going to be expensive was my 1st thought, however i was thinking as there is no plug to tighten up, the thread should be easy to unwind unless its been cross-threaded! so i found a torx bit the same inner diameter as the plug thread left in the head and being a torx bit the edges on the bit was nice and sharp, so with torx on extension and the lightest tap with the hammer i felt it sit into the thread part and set about unwinding it out, it also came out with the little washer so i was well chuffed to say the least, i changed all the plugs with new iredium ones just to be 100% and its fine now however cant think why the plug snapped unless they was tightened to much by previous owner as i did not fit em and have never touched em
Dave
