I have a 1019 XCA and there is a rattle when idling with the clutch engaged in neutral. However, in 9 months of ownership I hadn't noticed it until someone on another thread said it put them off owning one.
It is so faint that I have to concentrate to pick it from the general sound of the running engine.
Bike is completely standard, no fruity silencers etc and I would describe it as sweet, smooth and reserved when sat idling.
Maybe some are noisier than others ?
Record a short clip on you tube and post a link, others could do the same and you might get a sense of whether yours is excessive.