…another one…
Well, first you can check also these possible noise sources:
- both 274 bolts, left and right of the locking latch are tight?
- both bearings 100-03 and 100-04 are present and intact?
- the belt is not too tight?
…but according to the sound you’re another victim of Ming cycles rear hinge botch as described already here:
Rear hinge – finally the sad truth
(I’m going to reply there with latest news asap.)
Plz tell me - the sound does appear mainly under higher load - as like while pedaling hard uphills?