Top, front, and back views respectively. Note the Razor scooter next to the large chassis - the Razor scooter is quite rideable but the new one will be a much more heavy-duty machine. The red battery container in the back is 7x7x7 inches. The chassis also contains front and rear suspension as well as disk brakes.
This is the electric motor. Per seller's specs it is 2HP and 4000RPM at 12VDC - according to my testing, under load the motor was able to do just under 2000RPM which got me to 25mph, a respectable speed. However the motor was rated for 24V and running it at that voltage should get me closer to 50mph if I ever get aroung to buying new batteries. The motor weighs a little over 20lbs and is respectably large, as can be seen in the PC mouse comparison photo.
This is the chain (#35) that will be used to connect the motor to the wheels. The back wheel actually had a sprocket on it, which was for T8F chain (very annoyingly between #25 and #35; good luck finding that chain size) and after it was confirmed to not fit 35 chain the sprocket was discarded. I am planning to get two sprockets, 21 teeth for the motor and 60 teeth for the wheel. That will translate to a speed of about 35mph at 4000 motor RPM (which may or may not actually be attainable - update: it wasn't attainable at 12V but 25mph was).
Battery vs. motor size comparison. The densities of the two are about the same, but the battery is quite larger. It provides what seems like a good amount of power, but this has not been tested with any significant loads yet. (Update: this keeps the scooter powered for about three miles of riding. A bit less than I expected.)