S3 Cast Piston Ø78.950 mm Racing Long Life - Beta (Ref. PI-1300-A)

Designed for demanding off-road riders, this S3 Racing Long Life cast piston brings strength and longevity to the heart of the engine. Made from high-quality aluminum-silicon alloy and treated with a layer of molybdenum disulfide, it reduces friction and eases the break-in process. The nitrided steel rings ensure durable sealing in the cylinder, even under intensive use.

Composition and Treatment

• High-end aluminum-silicon alloy
• Molybdenum disulfide (MoS2) coating to reduce wear
• Nitrided steel rings for increased strength

Features

• Diameter: Ø 78.950 mm (oversize A)
• Type: cast piston, lightweight and durable
• Designed to limit vibrations and stabilize engine behavior during throttle response

The kit includes

• 1 piston
• 2 rings
• 1 pin
• 2 clips

Compatible with 300 cc cross engines such as SHERCO 300 ST FACTORY (2023), GAS GAS TXT PRO 300 RACING (2017), and SHERCO 300 ST-R (2020). Replacement part suitable for racing setups where durability and consistent performance are sought.