Razor Dirt Bike modding for weight savings and speed featuring Hart drill batteries

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 3 videos I posted on its progress.

It is a beast now.

Part 1:

 

Part 2:

Part 3: 

 

Part 4: