Vertex Complete Gasket Kit Yamaha YZ-WR125 05-21/Fantic XE-XX125 21-22 Vertex complete gasket kits are available in two configurations; with or without oil seals. The Complete Gasket kit includes all OEM specified gaskets and o-rings necessary to rebuild the engine, as well as valve stem seals, but does not include oil seals or a formed rubber valve cover gasket. The Complete Gasket Kit with Oil Seals includes all OEM specified gaskets, o-rings, and engine oil seals to rebuild the engine, as well as the formed rubber valve cover gaskets, but does not include the mechanical water pump seal. All cut gaskets are manufactured in USA from high performance Interface MicroPore gasket material where applicable.