Just my 2 cents.

24V scooters and 4 kart tyres are fairly large and heavy.
Large means a lot of armor to protect everything. Armor does weight a lot.

And a very powerfull flipper.... Any idea how powerfull very powerfull is?
A very powerfull flipper uses a lot op power. Most flippers use CO2.
But if youre very creative, a lot of batteriepower.
In all cases, heavy options.