I recently purchased a Razor dirt bike to mess around with. They are under 500 bucks on Amazon and I figured I could make it fun with a bit more investment and using what I had on hand via the easiest means possible. Part 3 went off the rails, but that's ok. It was worth it.
Here are the videos I posted on its progress.
It is a beast now.
Part 1 -Overview and battery swap from stock lead acid batteries to a 40volt Lithium Hart tool battery.
Part 2 -Streamlining and discussing next steps
Part 3 -After installing the upgraded motor and controller and before and after riding videos
Part 4 -Additional details about how I am connecting the Hart batteries together and discussion about my custom made battery and how I messed up building it.
Part 5 -I have constructed a new self built battery with higher amperage cells and better overall construction. This is a battery discussion and show and tell of what I have created.