Did it about 2 months ago, takes some time, but was able to get it all off without removing the headers. Put a piece of cardboard across the radiator so as not to crush any of the fins.
I also changed the oil at the same time, which was a good thing cause it allowed me to get the pair value out with the oil filter removed.
I actually took the pair valve off the mounting bracket, cause I could not get to the bracket with the valve attached, then removed the bracket after. Worked for me.
With the proper tools, a good small socket wrench, I had little trouble.
Good luck, keep the bandaids handy.
ride safe