02 YZ426 engine noise...

I think this is a normal deal...but i was listening with my head next to the crank case today... and i heard a lot of whining comin out. I'm new to short stroked high performance 4 strokes. I've only had the bike for about 2 months, and this is the first time I've had my head close enough to hear it. It just sounded like way more engine noise than my 2 stroke put off. But then again my 125 didn't have dual overhead cams, 5 valves, or giant gears on the inside. Like I said it's probably typical and I'm probably being paranoid. Thanks in advance for your replies.

Normal, like you said there is alot of things going on inside those engines especially when compared too 2 strokes.

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