Prox Cast Piston:

The Prox cast piston (made from high-quality aluminium alloy) is fitted as standard by a large number of brands.
The manufacturing process of the Prox cast piston gives it a longer lifespan and better engine response.
The Prox cast piston is an essential part for the maintenance and repair of off-road motorcycles.
Replacement segment ref: 267677
The piston kit consists of:

• 1 piston B dimension: 43.45 mm
  
• 1 piston pin
• 1 set of rings
• 2 circlips

(Photo non-contractual)