The size of the youth model engine ranges from 50cc to 125cc. Pitster Pro FXR 125R, Pitster Pro quad, KingQuad 500 Axi and Mongoose 50 4T are some youth models manufactured. Entry Level Four WheelersThis category is next to youth models in size and price. It is also known as recreational trail class. The size of the engine ranges from 125cc to 250cc. Automatic transmission is a main feature of the model. For those who prefer casual pace, entry level four wheelers are best suited. Yamaha Raptor 250, Yamaha Blaster, Polaris Phoenix 200,Suzuki Ozark, Can Am DS250, Kawasaki Bayou, Honda TRX250X are some entry level four wheeler models. Utility QuadsBy definition, utility quads is primarily used for heavy work purposes like plowing fields, hauling cargo etc. It is used in factories, law enforcement agencies and also by scientists. Utility quads are popularly used by people who have agricultural businesses and construction workers.