It includes all the necessary components to rebuild the top end of your KTM 50SX with an air-cooled engine. Simply replace the existing cylinder assembly and you'll be ready to ride again. KIT.STD 2008: KTM 50 Mini Adventure KTM 50 SX KTM 50 SX Junior KTM 50 SX Mini 2007: KTM 50 Adventure Senior KTM 50 Mini Adventure KTM 50 Sr Adventure KTM 50 SX KTM 50 SX Junior KTM 50 SX Pro Junior LC 2006: KTM 50 Adventure Senior KTM 50 Mini Adventure KTM 50 Sr Adventure KTM 50 SX KTM 50 SX Junior KTM 50 SX Pro Junior LC KTM 50 SX Pro Sr LC 2005: KTM 50 Adventure Senior KTM 50 Mini Adventure KTM 50 Sr Adventure.