ATHENA P4C0470013005A Top-End Piston Kit for KTM 85 SX 2003–2017

Rebuild your engine with confidence using the Athena Top End Piston Kit. Designed as a complete top-end solution, this kit combines a premium cast 2-stroke piston with a perfectly matched top-end gasket kit to simplify installation and deliver dependable performance. Every component is engineered, tested, and manufactured by Athena to work together, ensuring excellent sealing, reliable operation, and long-lasting durability for your next engine rebuild.

The piston is gravity cast from a high-performance, high-silicon aluminum alloy and precision CNC machined for exceptional strength, dimensional accuracy, and OEM-quality fitment. Its optimized design promotes smooth engine operation, efficient combustion, and consistent power delivery. Select applications also feature a molybdenum disulfide skirt coating to reduce friction, minimize wear, and extend engine life. Premium piston rings provide an excellent seal against the cylinder wall, helping maintain compression while reducing friction for maximum performance.

Included in every kit is Athena's premium top-end gasket set, manufactured using advanced materials and precision engineering backed by over 40 years of gasket manufacturing experience. Designed for dependable sealing under demanding riding conditions, these gaskets provide the reliability needed for both recreational riders and competitive racers.

• Complete top-end rebuild kit

• Includes cast 2-stroke piston and matching top-end gasket kit

• High-performance high-silicon aluminum alloy piston

• Precision CNC-machined for OEM-quality fit

• Gravity-cast piston construction

• Excellent strength, durability, and wear resistance

• Optimized piston profile for efficient combustion

• Premium piston ring for superior sealing and reduced friction

• Precision-engineered gasket kit for reliable sealing

• Designed and tested by Athena for long-lasting performance

Includes

• Cast 2-stroke piston

• Top-end gasket kit

• Piston ring

• Wrist pin

• Circlips

• Piston Type: Cast

• Piston Diameter: 46.94mm

• Displacement: 85cc

• Compression: Standard

• Piston Head: Domed

• Big End Pin Diameter: 14 x 9.5 x 40mm

• Number of Piston Rings: 1

• Manufactured from high-silicon aluminum alloy for exceptional durability and reliability

• Select piston applications feature a molybdenum disulfide skirt coating to reduce friction and extend service life

• Athena gasket kits are engineered for OEM-quality sealing and dependable performance

• Verify piston size and vehicle compatibility before ordering

The ATHENA P4C0470013005A Top-End Piston Kit is designed for KTM 85 SX models from 2003 through 2017. It provides a replacement piston kit for top-end engine service on the specified motorcycle application.

Identified by part number P4C0470013005A, this ATHENA kit is supplied as one unit. Confirm the part number and model-year application before ordering to help ensure the correct replacement for your service needs.

Features:

• Brand: ATHENA
• Part Number: P4C0470013005A
• Product Type: Top-end piston kit
• Application: KTM 85 SX, 2003–2017
• Unit of Measure: Each