This front and rear cylinder kit with crankshaft plain bearing is designed for 800cc ATV and UTV models compatible with HISUN YS800, MSU800, and MASSIMO vehicles.The kit supports in off-road applications.It measures 13 cm in height, 25 cm in length, and 11 cm in width, structural compatibility with specified ATV, UTV, and SSV systems.The design allows for efficient cooling and integration into existing engine configurations.The component contains no materials that evaporate at temperatures above 105℃, contributing to stable performance under elevated operating conditions.Installation is straightforward for replacement with minimal downtime.Suitable for use in go karts and other compatible recreational vehicles.