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Not sure where to post this. There is an intermittent buzzing noise around 4000 rpm. I though maybe the horn was malfunctioning so I unplugged it. No luck. It sounds like its coming from the front of the bike. By buzzing I mean a loud distinct buzz not a vibration. Could it be a relay? Maybe the breather? Its difficult to track down since I only hear it when I'm riding.

I'm sure I'm not the only person that's come across this but searches have yielded nothing. Thanks in advance for any advice.

Jordan.