Batteries:
Pricey but best bang for the buck i think and form factor you can get.
It’s been a while since i’ve updated this thread but i spent all season running practice sessions with anyone and everyone that wanted to drive the kart at the track. It held up wonderfully, not to jinx it but it went better than i anticipated all year. I set it up to run standard mode at i believe 150 amp draw, which puts it about 1-1.5 sec/lap quicker than the 206 or about yamaha can speed. i also put in a sport mode button that brough draws up to 320 amp which made it quicker than Ka100’s. Longest stint from 100% -~20% (when the battery would noticably start pulling power and you’d pick up 1-2 sec a lap due to power loss) was about 20 mins of continuous running. Never when we took it out were we just putting around, always at race pace.