I had my engine cover off the other day and I noticed when I hit the gas there was a short whistle during the transition from idle to throttle open. I took a recording, but the sound is very faint (so I can't post it for comparison) but I thought I detected the same sort of whistle in your video when you hit the gas. I can't hear it at all when the engine cover is on, and I never heard it when driving. So I am interested in what comes out from this thread.
Steve
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