Vertex Oil Seals Yamaha YZ450F 14-22/WR450F 16-23 / Fantic XXF 450 22-23 Vertex’s engine oil seal kits include all the necessary engine oil seals required to rebuild the engine and transmission, including crankshaft, output shaft, water pump, clutch shaft, and starter seals. Oil seal kits do not include valve stem seals or mechanical water pump seals. One part number includes every seal within the engine Does not include valve stem seals Does not include mechanical water pump seals