Using the right tools to take something apart can save time, money and aggravation. Also prevents FOD.
If you want replacement caps, I'd go with the DBI Fork Tube Caps. I bought a set for mine and no more jacking it up to change the fork tube oil. It's got a 10mm center Allen socket.
I've gotten lots of people ask me what it was for, and they were shocked and wondered why Harley or other manufacturers don't do that to make it easier for the end user to change the fork oil. Something that most people neglect.