Top End Piston Kit; KTM 85 Sx 03-17

Description

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.

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Complete top-end rebuild kit

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

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High-performance high-silicon aluminum alloy piston

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Precision CNC-machined for OEM-quality fit

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Gravity-cast piston construction

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Excellent strength, durability, and wear resistance

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Optimized piston profile for efficient combustion

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Premium piston ring for superior sealing and reduced friction

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Precision-engineered gasket kit for reliable sealing

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Designed and tested by Athena for long-lasting performance

Includes

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Cast 2-stroke piston

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Top-end gasket kit

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Piston ring

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Wrist pin

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Circlips

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Piston Type: Cast

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Piston Diameter: 46.94mm

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Displacement: 85cc

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Compression: Standard

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Piston Head: Domed

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Big End Pin Diameter: 14 x 9.5 x 40mm

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Number of Piston Rings: 1

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

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

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

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Verify piston size and vehicle compatibility before ordering

California residents

WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.