X-TREME 49cc GAS SCOOTER ENGINE COMPLETE PLEASE NOTE:This scooter engine is compatible with all 49cc and 52cc applications using OEM engines that visually look like the detailed picture on the item page. This engine is not compatible on any Bladez brand gas scooters. This 2-stroke 49cc engine is used quite frequently on custom projects and applications. Please ensure this scooter engine will provide the form, fit, and function needed on your custom scooter, go kart, gas powered bicycle, or other personal transportation vehicle prior to ordering! Compatibility: XG-499, ScooterX Xracer, Dirt dog, and all chinesse scooters that have the same type of engine.! 30 Day Warranty- If something goes wrong with your engine, we will send out replacement parts (pull start, coil, etc.). If the problem is too large, we will replace the whole engine.