What have I done to my TDM today? Well, whipped off the pipes and collector box (chr*st they weigh some!) and took off the nuts from the studs in the head to remove the front pipe. All four nuts came off, the collars are both loose around the outer studs but NOT the inner - result - front pipe still firmly in place. Gentle leverage not working, obviously concerned about doing something which might compromise (ie snap off) the offending inner studs  - I have traumatic memories of doing just this to a water pump on a Mk1 Golf Gti way back in m'youth- so, folks, any suggestions please? At the moment I am slathering it in more WD40 and waiting but is there a more definitive technique?Â
...And a 2016 MT-09 Tracer.Â