not sure i understand that properly, was the needle showing 9000rpm and the bike sounding normal, at idle, or was it really stuck at 9000rpm making alot of noise...
make sure the throttle cable isnt sticking first, then check no loose connections anywhere around the throttle bodies or ecu
i know that adjusting the idle on newer shape bikes (like the one in your picture) has to be done electronically.. with an axone... at a dealers....