Vertex Top End Gasket Kit Yamaha YZ450F 20-22/WR450F 21-23/Fantic XXF450 22-23
Product Info:

Vertex’s top end gasket kits are designed for tackling the job of replacing a piston.
Each set includes the head, base, exhaust pipe, and power valve gaskets necessary for a top-end rebuild.
Formed rubber valve cover gaskets are not included.
Multi cylinder applications include all necessary components to rebuild all cylinders.