If done right, that will be wicked
No waiting for power. Instant peak power.
Batteries are ALWAYS the real issue with electric. How sweet if you could gut an old tank and store them (or at least some of them) there.
Will it be digitally controlled? Just curious how you would have a speed control otherwise. Top speed potential exceeds sanity. I like it!!!!
What's the max RPM of the motor? Easy to extrapolate top speed; sprocket ratio and tire size.
When complete you should look into a solar panel with a trickle charger setup to mount on top of your garage. Just plug it in when you're done playing.