I have the same seat on my Deluxe and I didn't notice any unusual vibration. No different than the stock seat anyway. I will say though, it is a lot firmer seat and it took me a couple of rides to get used to it. Now I love it and wouldn't trade it for anything. The stock seat killed my lower back. With the Corbin I can ride all day.
This is for future readers since the thread is 2 yrs old anyway:
I got a Corbin Solo for my '98 RK and love it, but do get more seat vibration and numbness in my Johnson like when you ride a bicycle seat.
Still, it is so much better than stock; get yours!!!
There is no comparison to any vinyl seat and the rich leather of a Corbin.
Got my Corbin backrest yesterday and as it stops raining, will ride the rubber off the Dunlops.