I agree. When you are moving, hopefully openings behind the faux grill would allow air to be pushed in. I would speculate that the side vents and opening under the tank (transmission) would allow enough air to flow out.

A heat activated fan would certainly create positive flow forcing air out the vents and transmission area. This would be a plus at low speeds/traffic/etc. Just thinking out loud, but at below 10 mph you would have the engine fan blowing air forward, and right behind it a fan blowing air backwards. Hmmmmm.

Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys