Hello, new to this forum. Was hoping someone could help me with identifying this rattle/noise. The bike is a 2020 CRF 250f. We just bought this bike used. I do not know how many hours on it. It sounds great at an idle and low revving. The noise comes on when you wind it up. Makes the sound in gear, in neutral, & it doesn't matter if the clutch is pulled in or not, still makes the noise. I have checked every single bolt. Motor mount. Everything external on the bike, nothing is lose or broken. Any suggestions would be helpful. We really do not have a good bike shop where we live. Tearing into it is not a problem for me, but would like a suggestion on where to start. In the video link, the first time I rev it it is normal. No noise. The second & third time you will definitely hear it. It seems to be at an exact RMP range. If I rev past the noise, it seems to go away. It also seems to be much louder under a load when I am riding it. Thank you.
