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While I was out riding last night, I had a thought. As I can't really do any static rev-testing at home (neighbours and the noise only happens when the bike is warm) I was wondering if it is actually the clutch making that noise. Previously to stop the noise, I have either pulled the clutch lever in or changed gear to avoid that exact rev-range but last night as I was going along I pulled the clutch lever in and revved the bike to hit the 3.5k - 4k rev range and the noise appeared, I also noticed it at a higher rev range too which is new and slightly worrying. I know the clutch will still spin but its not loaded or being driven etc but it made me think, what if the noise is from something else on that side of the bike such as a cam belt tensioner or something. Do they make a noise when they are on the way out? is there anything else on that side of the bike that could make this high pitched whining noise? or am I just clutching at straws here....
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