21-07-16, 02:49 PM
like I say it sounds like vibration noise, try what I've suggested. The higher the revs the more the engine/exhaust noise will mask it thats probably why you're only hearing it between 2.5k and 3k, any thing lower than that is probably not enough to make it vibrate enough to make the noise.
RIP my beautiful red beast 1999 to 2017 ???