It's really not too much of a stretch to just design a map in a way that trying to abuse gravity would just end up sending you plummeting sideways to your doom.
I already did this, but I should use xalos' fixed gravity vehicle scripts instead of the old ones that fly away
Speed Kart 8?
I already have 3 tracks made for this variant in mind. Zone bricks and events are used to ensure players play the course right.2 of those tracks come from the F-Zero series. Look up Big blue.
note: works on every vehicle but skiis
I have a GravityKart model done-pisn-It just needs the gravity part to work