14-10-20, 06:31 PM
Its not the rotor, it's the bearings mate. Even if you've used OE bearings, the rotor could well be slightly different sizes/tolerances and the bearings start spinning, that's the whining they can fail in no time, hopefully not but in some way easier to sort out.
As said it's notoriously difficult to suss noises out, hopefully your chap will suss it and it's nothing bad, it could even be something completely unrelated, i.e. something in the air box, I kid you not.
As said it's notoriously difficult to suss noises out, hopefully your chap will suss it and it's nothing bad, it could even be something completely unrelated, i.e. something in the air box, I kid you not.

Later