High quality replacement engine, fits the majority of gas scooters, pocket bikes, and mini choppers configured. 49cc 2-stroke single cylinder air cooled ngine, made of high quality material, durable. Chain: T8F (Not included). Package size: 12″ x 11″ x 9″, Shipping weight: 11.5 lb. If you have any questions, please contact us at any time, we will do our best to help you. Specifications: 100% brand new 49cc single cylinder 2-stroke Chain:T8F (Not included) Package size: 12″ x 11″ x 9″ Shipping weight: 11.5 lb Fitment: High quality replacement engine. Fits the majority of gas scooters, pocket bikes, and mini choppers configured. Package includes: 1 x Engine Note: – Please check the size measurement chart carefully before making payment. – The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. – Instruction is not included.