Manufacturer Ref: VTK24352A — VERTEX high-end engine kit dedicated to demanding motocross enthusiasts. Designed for two-stroke engines, this kit combines a piston and a machined cylinder to deliver a sharp response and longevity suited for heavy track use.

Main Features:

• Compatibility: YZ 65 (models 2018, 2020-2024) — also suitable for recent YZ 65 models (2024-2026 depending on installation)
• Displacement: 65 cc
• Cylinder Diameter: Ø 43.500 mm
• Piston Diameter: Ø 43.450 mm (over size A)
• Compression Ratio: Standard (STD)
• Material: cast aluminum piston

Vertex pistons are gravity cast from an aluminum alloy enriched with 18% silicone. This composition limits thermal expansion and allows for tighter tolerances than other cast pistons, promoting better piston/cylinder fit without excessive adjustments. The silicone also enhances wear resistance, particularly the durability of the piston skirt, and contributes to more uniform wear during motocross use.

Ideal for renewing the top end of your YZ 65 or preparing for a rebuild after the season, this kit provides a reliable foundation to restore clean engine performance and controlled cylinder sealing. Original VERTEX part, designed for recreational competition and off-road outings.