Can I make my Rascal mobility scooter highway legal ?

The lighting won't be a problem, but I need to pull 70 or 80 more horse power out of it.
Got any suggestions?

Bigger batteries.

turbo boost and a bug guard

No. plant flowers on the seat of the scooter and place it in your yard as a lawn ornament, then go out and get a real motorcycle.

Quick answer. No, you can't. In most states the same laws that apply to pedestrians apply to mobility scooters. So, unless a pedestrian is highway legal, neither is a mobility scooter.

Mount some dub deuces on it.