xt660z oil drain plug - broken thread
 

Word of warning if you replaced the original oil drain plug in your xt660z with the magnetic version from the off-the-road.de
The thread is shorter so the moment is definitely not 30 Nm as for the original - they didn�t mention about it on the page.
It happened to me yesterday during the oil change. I had a terrible vision of dismantling the engine and rethreading the crankcase but fortunately more than half the length of thread was intact so I used the original longer plug.

http://www.image-share.com/upload/3217/161.jpg

Thanks misieeg for bringing that to my attention and everyone else's it is good to know these little things!..I need a little book for all the tips I pick up on here!!..

Dont forget you still only effectively have approx half the thread in operation, so dont overtighten again.