Piston

• Product Details

  Forged Piston.

  Athena, leader in producing motorcycle spare parts for over 40 years, unveils its new range of 4-stroke off-road forged pistons made by reverse extrusion. Produced with cutting-edge CNC machining tools, which ensure dimensional tolerances of less than 0.01 mm, Athena pistons are made of a special high-performance aluminum alloy with high silicon content that guarantee the same reliability of the O.E. piston, while at the same time providing greater resistance and excellent performance. The perfectly smooth profile ensures a regular flow and the perfect flame propagation.

  Some pistons skirts are moreover treated with a molybdenum disulfide coating applied by screen printing which further reduces friction to enhance performance and durability.

  Athena engineers ensure advanced technical solutions and the highest quality standards equal to or better than those adopted in O.E. production, so as to guarantee performance and reliability.

  Each piston, engineered in Italy by Athena R&D department, is tested on engine dynamometer benches under progressive stress load, and thereafter on the track to validate its performance even in the most extreme conditions.

  The proven quality of Athena pistons is offered at an extremely affordable price.

  This piston for Athena and O.E. cylinders is equipped with piston rings that guarantee less friction with the cylinder and therefore a higher performance.

  Athena takes care of the development of the pistons down to the smallest detail: the rings are produced in Japan with wear-resistant coatings (PVD or chromium nitride) to increase the retension and the durability. The rings perfectly adapt to the cylinder liner even at low tangential load.

  This piston kit contains the piston, the pin, the circlips, and the piston rings. All components are replaceable and interchangeable in case of need.

  • Athena developed their forged pistons specifically for use in the off-road/ATV market and manufactured them using a revolutionary computerized technology originating from GP and F1 racing.
  • Athena forged pistons offer the best solution in terms of performance and reliability thanks to redesigned squish areas, modified compression characteristics and advanced surface treatments.
  • Piston is sold complete with rings, wrist pins and circlips.
  • Sold as a kit.
  • Note: Kit contents vary by application.

  Note: All Athena products which are manufactured with higher displacement and power than those permitted by law of the country where the end user lives are intended solely for competition-sports usage.

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• Fitment

• # Part Numbers

  Product Variant	Manufacturer Part #
  A Piston	S5F07900002A, S4F09600017A, S4F09700017A, S4F09600012A, S4F09600019A, S4F09600014A, S4F10000006A, S5F09600007A, S4F09700020A, S4F09600020A, S4F09700019A, S4F09700016A
  A Piston 12:1	S4F09600009A
  A Piston 13.5:1	S4F09600010A
  A Piston High Compression 13.2:1	S4F09600013A
  A Piston High Compression 13.5:1	S4F09700015A, S4F09700018A
  A Piston High Compression 13:1	S4F09600016A
  A Piston, 11.5:1 Compression	S4F10100001A
  A Piston, 12.0:1 Compression	S4F10000005A
  B Piston	S4F09700018B, S5F07900002B, S4F09700016B, S4F09700020B, S4F09600017B, S4F09600014B, S4F09600019B, S4F09600020B, S5F09600007B, S4F10000012B, S4F09600012B, S4F10000005B
  B Piston High Compression 13.2:1	S4F09600013B
  B Piston High Compression 13.5:1	S4F09700015B, S4F09600010B
  B Piston High Compression 13:1	S4F09600016B, S4F09600018B
  D Piston	S4F102000040

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