I was curious as to how the idea of (4 length : 1 Height) ratio would apply to my Ninja 250. So i drew a diagram in photoshop to figure it out.
I took into consideration where my head would be for the highest point.
The lighter fairing meets the 4 length : 1 Height ratio completely.
It would be 15.4 feet long!!
The dark fairing is perhaps a more realistic and streetable approach.
It would be a realistic 8.55 feet long.
Not too far off from what the prometheus EV ninja looks like.