The Ring of Fire attaches to the rotor cover with double sided tape. It's easier to install and postion the Ring of Fire on the rotor cover if you use a drop or two of dish soap in a cup of water and with your finger wipe a little bit of the soapy water on the rotor cover where the Ring of Fire goes. The soapy water will allow you to move the Ring of Fire around and postion it on the rotor cover exactly where you need it to be. After you mount the Ring of Fire that little bit of soapy water will dry up and the tape will totally stick and your Ring of fire will be mounted perfectly ...otherwise the sticky tape sticks where you first place it and you better have in the right place the first time you try it.
Ditto on what Wingnut said - get them already put together. I install the rotor covers with the ring of fire this summer. Instructions were good. Just be sure to get the ring of fire already installed on the rotor covers.
The best purchase I have ever made for attracting attention, the cagers love it. I chose the red/blue lights, go figure being a cop. No regrets and a easy install. They now make a rear tire ring of fire, but not sold on that unit yet.
I suggest you install one of the switch assemblies on the brake master cylinder cover. Has three switches. Not expensive. I have the ring of fire lights (and others) to one and the saddle bag lights to another. I normally Turn them on only at night.
My plastic disc covers, (not sure which brand) were a little tough to align when new. Make sure they are room temperture to flex in place. After they were on the bike a time, they flexed to shape needed. Drove me nuts wondering why the last hole would not line up at first, then just pressed to place.
I've had them on all My bikes get the real Honda one there made of actuall metal not plastic they fit perfect and won't break as a few of mine have over time, Honda is twice as much money but worth it all other brands other than Honda are plastic