Hi, Anyone got any tips for removing an O2 sensor from an M50? Got my new Staintunes today (thanks - you know who you are!). I managed to loosen about 1/4 turn and thought "great, this will be a piece of the proverbial" then it just seemed to tighten up again. Original pipes still on and bike only just over a year old, so wouldn't think someone had tried to remove before and stripped the thread etc. It's locked in so tight I even burred the nut, so rather than slip off completely and damage the orig. pipes (or my knuckles) I've decided to ask if anyone has any tips for getting these b*stards out? didn't have this issue when I fitted 'tunes to my BMW R1100S - O2 sensor undid and came out very easily. Thanks in advance for any suggestions!