I bought a 2006 CBR1000RR. I got it for basically nothing. Didn’t run said it needed a charging system rebuild “ stator/rectifier” not a big deal Turns our all it needed was a new battery. GREAT!! However the person told me it made a hissing noise out the front like it’s leaking air or something. Told me it wasn’t a big deal to him that he rode it the way it is. Well now that it is running this noise is not some small simple noise. I don’t guess I can post a video but if someone would be awesome to help I can email a video of he noise.