Hi,
Did you find/resolve the issue to your problem with the noise? I have the same problem with mine from yesterday. Gave it a good go up a long hill with a couple of turns then I started to hear this noise after I slowed down. It does it from 3.5rpm. I didnt risk going higher & drove home on low rpm.
At first I assumed it was the transmission but everything still works fine there. The difference with mine is that even with the clutch pulled at idling & reving the engine, the noise is still there. An update will be helpuful thanks.
Brendon