now i was told by Gabe B from CEN they came with the "Race Track" Gearing installed ( smaller gears and belt ) and the highspeed gears and belt, included in your spare parts, was the speed set up, slower off the line, but faster in the end run due to the taller gearing. and i have to agree. i can only get about 63mph with gearing installed when i got it new, n the extra in my parts bag are taller, so ill get more top speed.

i have also seen others have modified other gears and belts for some slightly different gearing ratios too.

Timmahh