It would be my bet the OE single top clamp will not work with aftermarket risers, they might.
You will need to turn the wire clips on the back of the bars around 180 degrees.
You may have to reroute the throttle cables to inside the triple tree.
Top clamp may work if it is a Honda aftermarket riser. I moved my Rivco Risers from my VTX to my Valk and the top clamp worked. I had VTX 1800C Risers on my VTX 1800R and was maxed out on cable length, so I didn't move them over to the Valk but probably could have with some cable rerouting.