I just changed mine out to the SE Comp last weekend in my '09 Street Glide. Unless your side casing is different than mine, you will not be able to remove the rotor. This is due to the ridge on the inside of the casing. Your options are: loosen or remove the inner casing; or grind the lip away providing clearance for the rotor. I chose to grind.
Be sure to protect everything from the metal shavings and clean up afterwards. I used a vacuum as well as a magnet to remove all shavings.
Now that the casing is clearanced so the rotor can be easily removed, the job can be done in less than an hour from start to finish.
I was able to remove the Comp without removing the clutch. I did remove the spring tensioner. That left enough slack in the chain to be able to slip the Comp sprocket off the shaft and back on.
Good luck.
Jim