Buyers should prioritize engine displacement (typically 200cc to 1000cc) based on intended use. For road legality, ensure the vehicle includes DOT-approved tires, side mirrors, turn signals, and a horn. The transmission type—CVT (Continuous Variable Transmission) is standard for ease of use, while manual sequence gearboxes offer better control for off-road performance. Additionally, verify the suspension system, looking for independent double A-arm setups with adjustable oil or gas shocks to ensure stability at higher speeds.