It is driven by an XL motor geared up 1.66667:1. This results in a reasonable amount of torque for it's size, and it is very quick.
The steering is done via a worm gear and 24 tooth gear assembly, placed above the suspension struts. It is a reliable solution and fits rather well, except for the M Motor poking out of the front.
I have retained all the original features (working handlebars, suspension and 1 cylinder fake engine).
I changed all the soft springs for hard springs to handle the extra weight of the Power Functions components.
I am happy with the result, even though it is very ugly, it is incredibly fun to play with.
