I leave mine off in the overall scheme of balancing comfort and heat management.
Also have removed the foams from everywhere but the radiator sides, and trimmed the lower fairing rear openings to increase flow and blending.
The results have been lowered engine temps and greatly increased comfort for me.
A Kawi factory rep commented to me that they wished they could have done just that, but had issues with decibel levels to contend with at the time.