The cams and chains make alot of that noise, you don't hear it in push rod motors like harleys but it's very prevelent in big jap bikes too. Overhead cam engines have alot of chain to spin, that's why (along with cost) cheap cars ran timing belts instead. An exotic or muscle car can get away with noises like that but when you drive a sewing machine no one wants to hear chain whine, intake whistle or injector clack. Besides, belts slip and fail, on tight clearance engines where they can't "free wheel" without the valves hitting the pistons .... BOOM! serious engine damage. Chains are noisy but much stronger and more reliable than belts. It's a trade off.
I have a little more whine than I should but it's my waterpump, for whatever reason Triumph looked at it and said it was normal. I don't believe them for a second but I still have another year left on the the warranty and will wait till it either fails or throw a fit just before the warranty expires.
You can isolate the location of the noise with a stethescope or a big screw driver. Hold the grip of the screw driver pressed to your ear and touch the other end to different areas of the engine while its running. You probably already know that trick but someone else might not.
