I popped the cheek pads out of my Arai Corsair and there was a nice recess there to drop the earpieces in . I then took the removeable lining out of the helmet and ran the wires behind that and popped it all back in , You wouldn`t even know it was there . As far as the Shoei is concerned I can`t help with that apart from one thing ...... I have heard that somebody does "In-Ear" headphones with a 7 pin Din plug on the end .... that may be your answer there mate
