Funny whining sound

[antistar]

I have a 05 400ex that has a funny whining sound coming from the engine. It sounds kinda like a supercharger whine.
(Nope, it's not supercharged)
Ever heard a sound similar to this?

Thanks

[Pappy]

Its normal

[Pipeless416]

yup, normal for stock 400ex's. i always thought it sounded kinda cool :devil:

[antistar]

Great.
I never thought much of it until a friend asked about it.
He thought I supercharged it like my car.

Thanks guys!