The Sport and S25 are best suited for:
Average riders
Riders weighing 100 pounds or over
Riders looking for quick acceleration and tight handling
All-around general use

The Liquimatic and Geo-Sport are best suited for:
Lighter and more inexperienced riders (for example, children weighing less than 100 lbs., who may have trouble push-starting the Sport)
Making frequent stops and starts
Smooth and easy acceleration

The GSR40 and GSR40-TS are best suited for:
A faster, more powerful 41.5 cc ride with the cushioning of air tires
Centrifugal clutch and chain drive for easy acceleration and idling
General use, street cruising and off-roading
Heavier riders (200 plus pounds) due to the larger engine

The Bigfoot and Geo-Bigfoot are best suited for:
Riders looking for a smooth, air-cushioned ride
Off-roading, and riding on rough surfaces
Making frequent stops and starts
Cruising

The X-ped, Super X-ped, Super Bigfoot, and X25 are best suited for:
Riders looking for a fast and aggressive ride
Jumping, grinding and doing tricks
Advanced riders