When evaluating 250cc sport bikes, focus on the engine configuration (Single-cylinder vs. Parallel-twin). Single-cylinders offer better torque at low speeds and lower maintenance costs, while twins provide smoother high-RPM performance. Ensure the bike features Electronic Fuel Injection (EFI) for better fuel efficiency and cold-start reliability. Additionally, prioritize models with inverted front forks and adjustable rear monoshocks for superior handling, and verify that the braking system includes dual-channel ABS for safety compliance in most international markets.