The only difference that I'm aware of is the rear frame, suspension, brakes, left hand control, fork rake, exhaust, wiring to the rear, kickstand and the transmission mounts. Never really thought about it but it could be done.
The front part of the frame is pretty much a touring frame with a little more stiffness added by the plate tying the lower frame tubes below the transmission being a little heavier than on its 2 wheel cousins. Change all the items you listed, along with the trees and fork legs.