Is there any real point to keeping my front brake rotor guards when i put everything back together?

What is the factory purpose..do you guys keep them on or chuck them?

Only reason to keep them is if you have some sort of mint, unmolested quad with all original components.
Otherwise, they work well as frisbees.

There not going back on my zilla.

No

I herd from a Nasa designer that they create a high speed air vortex around the wheels resulting in a low pressure that reduces all drag and equates to a 55hp gain--or was it something that too many beers might have told me?  HUm

My rotor guards make more power on the dyno than yours do in the real world!