This two-stroke engine motor adopts 49cc single-cylinder air-cooled two-stroke design.100% new high quality, durable.The two-stroke engine adopts high quality material, powder spraying, anticorrosion, light weight, durable and more stable.Number of cylinders: single cylinder, stroke: 2 stroke, displacement: 49cc.With upgraded recoil puller starter, durable and easy to start. High-flow air filter provides more power and quick response.Fits most configurations of petrol scooters, pocket bikes and mini helicopters. High quality replacement engine.Note:1. Please check the size measurement chart carefully before making payment.2. The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.3. Instruction is not included.Package included:1 X Engine Specification: Material: Aluminum49cc single cylinderAir-cooled2-strokeChain:25H(NOT include)Fitment:Fits the majority of gas scooters, pocket bikes, and mini chopper