You really need to get hold of another map to match the increased air flow.

I run a DNA Stage 3 cover on my Tenere (which is similar design side cover filter to the X/R's Stage 2) and it has never been any trouble in the wet. Maybe deep wading might need some additional protection, but generally it won't be an issue if you keep it properly oiled and make very sure that the mating surface is clean and greased up when you fit it.

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