Just to re-itterate what others have said, the day before you plan to fit the roll bar, spray the drop link nuts with penetrating fluid and lots of it. If the nuts have seized there seems to be no other way of removing the drop links other than cutting them off. This is what I had to do to mine and I was left with the CTR off the road for a month while I waited for new drop links from Honda.
My advice would be to try removing the nuts, if they are stuck or very stiff, leave them alone and order yourself some new drop links and nuts to go with them, Honda dont supply the nuts with the drop links. Mine started to come undone with lots of force, but then the allen key hole in the drop link became enlarged and I had to dremel the nuts off.
Its a right pain in the arse! :lol: