Thanks TL Power
After a bit of heat and a beating with a hammer and chisel I have got one off, as I thought the collector box is double skinned, which explains the reluctance to do as requested. Will engage the other at a later date as I'm pooped!
primed the belly pan and luggage rack ready for paint, was thinking of bright orrange to contrast the blue bike, but seeing as I'm a tight arse and have some blue from a Yamaha, thought I would try it, can always change later.