I agree, it is a joyful thing when wound up. All the other noises are (I think) normal, I get the whine whilst pulling through the gears, I kind of like that one, reminds me of a V8 supercar! (We race those here in Oz)
This sound is carb related me thinks and probably a non issue and yes, I need louder cans, this always cured the engine noises on my Harleys!
How are you getting on with those cams?
Cheers,
Roden