Re: a little rough or buzz at 4250-4400 rpm
Posted: Fri Aug 11, 2017 10:30 am
Air filter exit? Is the seal off a bit like whistling through a blade of grass?beegmouse wrote:I have this exact thing.
It's definitely a resonance. A about 4-4.5K rpm something vibrates like crazy and makes a lot of noise. It almost sounds like a fog horn.
The other topic seems to say its cause by load being put on the baring in the case of the CVT.
It can't be that as there is almost no load at 30mph, and it does it irrespective of engine braking or accelerating or cruising.
The sound is defintly behind me as I ride, I think it's coming from the airbox or fenders as, I can't explain why, but it has a plastic sound to it, not metal, not a ringing. More like a fart.
If anyone else works out whats causing it i'd love to know.