VERTEX Ref: VTK24352C — High-end kit designed for motocross use, intended to replace the original top-end and restore factory specifications on YZ 65. Composed of a cast aluminum piston with a "C" oversize, this kit is aimed at riders and mechanics looking for a reliable overhaul of the top-end after wear or renovation.

Compatible with models:

• YZ 65 (2018, 2020-2024)

Frequently affected motorcycles

• YAMAHA YZ 65 (2026 - 65 cc)
• YAMAHA YZ 65 (2025 - 65 cc)
• YAMAHA YZ 65 (2024 - 65 cc)

SPECIFICATIONS

• Compression ratio: STD (standard)
• Displacement: 65 cc
• Cylinder diameter: 43.500 mm
• Piston diameter: 43.470 mm (Ø 43.47 mm)
• Oversize letter: C
• Material: aluminum
• Piston type: cast

This VERTEX top-end kit allows for the restoration of the upper part of the engine block to regain proper sealing and functional clearances according to factory specifications. An essential replacement part for engine maintenance on motocross circuits, it installs directly as a replacement on compatible models.