Took it for a ride and if there is any power loss then I couldn't notice. However, I did take several strips of 1x8" 1/4" thick adhesive backed foam rubber and wrap it around the front and sides of the air cleaner intake so the Corbin seat touches it when installed. Now the intake only draws air from the back or rear side. Took it for another ride and now I can no longer hear the intake and it runs as strong as ever.
I'll ride it for 500 miles and then throw the stock seat on and see if there is any difference. But I don't notice any now.