Vertex Top End Piston Kit, 53.94 mm for Yamaha YZ125 (VTK22520B)

Restore reliable top-end performance with the Vertex VTK22520B Top End Piston Kit for Yamaha YZ125 motorcycles. This cast OE replacement piston is manufactured from gravity-cast aluminum alloy with 18% silicone content, providing a dependable replacement solution for routine engine rebuilding and maintenance. The kit is designed to support proper fitment and consistent performance when replacing worn or damaged top-end components.
Feature: Heat-treated piston uses a T-5 hardening and tempering cycle to improve durability under demanding operating conditions. The piston skirt features a high-tech molybdenum disulfide coating that helps promote faster break-in and increased piston life. This coating supports smoother initial operation while helping reduce friction during the early stages of service.
The Vertex VTK22520B kit includes the primary components needed for a complete top-end piston replacement, including the piston, piston rings, wrist pin, circlips, top-end gaskets, and wrist pin bearing. Supplying these matched components in one package helps simplify installation and supports dependable engine assembly. As a cast replacement piston rather than a forged design, it is intended as an OE-style solution for Yamaha YZ125 applications requiring a compatible top-end service kit.
Feature: Application-specific replacement kit for Yamaha YZ125 models. Feature: Includes piston, rings, wrist pin, circlips, top-end gaskets, and wrist pin bearing. Feature: Cast aluminum alloy construction with 18% silicone content. Feature: Molybdenum disulfide-coated skirt supports faster break-in and extended piston service life. Feature: Vertex part number VTK22520B.

Features:

• Heat-treated piston with a T-5 hardening and tempering cycle

• Molybdenum disulfide-coated piston skirt supports faster break-in and increased piston life

• Gravity-cast aluminum alloy construction with 18% silicone content

• Cast OE replacement piston for Yamaha YZ125 applications

• Top-end kit includes piston, rings, wrist pin, circlips, top-end gaskets, and wrist pin bearing

Ships from Parts Unlimited.