Vertex Cast Piston:

The Vertex cast piston (made from high-quality aluminium alloy) is fitted as standard by a large number of brands.
The manufacturing and anti-friction treatment of the Vertex cast piston gives it a longer lifespan, better engine response, and reduces the risk of seizure.
The Vertex cast piston is an essential part for the maintenance and repair of off-road motorcycles.
Replacement segment ref: 261340
The piston kit consists of:

• 1 piston size B diameter (66.35 mm)
  
• 1 piston pin
• 1 set of rings
• 2 circlips

(Photo non-contractual)