This would reflect glare from other vehicles, street lights, and the sun, blinding other motorists and even the driver herself.

That’s the mild part. Another vehicle would see a reflection that would range from confusing to outright misleading. At minimum we are looking at a disorientating view: Another vehicle would receive an oddly-spliced view with the additional problem of concealing the motorcycle.

It’s easy to imagine an obverse vehicle (with the motorcycle stationary at, say, an intersection) believing another vehicle is speeding towards them head-on (their own reflection) and they veer off violently.

Then there’s the air-drag (in an ‘efficient’ vehicle, no less), the lack of ergonomics and the hot/slick/cold surface.

This is for art not engineering.