Free Shipping with purchase. Gas-powered go-karts are available in a variety of sizes, ideal for kids, youths, and teens and adults, at America's most competitive prices, including free shipping. These engines feature a centrifugal clutch, providing superior performance, torque, and speed control—so you can get the most out of your go-karting experience. The construction of your kart is made to last, so you can take the fun off-road, in the backyard, or on the track. Plus, the centrifugal clutch allows for ultra-smooth acceleration, making your go-karting experience more enjoyable.