Complete VERTEX top-end kit designed for motocross riders looking for a clean and quick engine block repair. This kit with a cast piston includes all the necessary parts to replace the piston and top-end seals, reducing trips to the workshop and disassembly time.

• cast piston
• rings
• piston pin
• circlips
• top-end gaskets
• needle bearing (for 2T applications)
• 4T versions include a timing chain

Technical specifications:

• Piston compression: Standard
• Bore diameter: 47.50 mm
• Piston diameter: Ø 47.480 mm (noted Ø 47.48 mm)
• Oversize letter: D
• Material: Aluminum

Designed for motocross use, this VERTEX kit simplifies the restoration of the top-end while maintaining the original settings (standard compression). Compatible with the models specified such as YAMAHA YZ 85 (notably the LW Big Wheels 19/16 and 2025-2026 listed versions). Manufacturer reference: VTK24370D.