2Bros Parts

PISTON KIT 100MM HONDA CRF 450 02-08, ATHENA S4F10000007A BIG BORE

£223.70

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Forged racing piston with a 99.95 mm bore diameter for Athena Big Bore cylinders. Manufactured using advanced CNC machining tools from a special high-performance aluminum alloy with high silicon content, ensuring dimensional tolerances of less than 0.01 mm. Some piston skirts feature a molybdenum disulfide coating applied by screen printing to reduce friction, enhance performance, and improve durability. The piston rings, produced in Japan with wear-resistant coatings (PVD or chromium nitride), offer increased retention and durability, adapting perfectly to the cylinder liner even at low tangential load. This kit includes the piston, pin, circlips, and piston rings. Technical specifications: Big End Pin Diameter 19x12x51 mm, Compression Height 29.00 mm, Compression Ratio 11.6:1, Displacement 450 cc, Net Weight 0.39 Kg, Number Of Segments 2, Piston Pin Type Biconical, Piston Type Forged. Partner Cross Reference code: SPARE RINGS S41316062. For competitive use only.

Specifications
SKU
56-K101.100.PIA
Brand
Athena
Availability
In Stock (8)

Fitments (95)

MakeModelYear
HM MOTOCRE MOTARD ALL2002
HM MOTOCRE MOTARD ALL2003
HM MOTOCRE MOTARD ALL2004
HM MOTOCRE MOTARD ALL2005
HM MOTOCRE MOTARD ALL2006
HM MOTOCRE MOTARD ALL2007
HM MOTOCRE MOTARD ALL2008
HM MOTOCRE MOTARD ALL2009
HM MOTOCRE MOTARD ALL2010
HONDACRE F R 4502005
HONDACRE F R 4502006
HONDACRE F R 4502007
HONDACRE MOTARD 4502002
HONDACRE MOTARD 4502003
HONDACRE MOTARD 4502004
HONDACRE MOTARD 4502005
HONDACRE MOTARD 4502006
HONDACRE MOTARD 4502007
HONDACRE MOTARD 4502008
HONDACRE MOTARD 4502009
HONDACRE MOTARD 4502010
HONDACRF 450R2002
HONDACRF 450R2003
HONDACRF 450R2004
HONDACRF 450R2005
HONDACRF 450R2006
HONDACRF 450R2007
HONDACRF 450R2008
HONDACRF 450X2005
HONDACRF 450X2006
HONDACRF 450X2007
HONDACRF 450X2008
HONDACRF 450X2009
HONDACRF 450X2010
HONDACRF 450X2011
HONDACRF 450X2012
HONDACRF 450X2013
HONDACRF 450X2014
HONDACRM F R 4502005
HONDACRM F R 4502006
HONDACRM F R 4502007
HONDACRM G 4502005
HONDACRM G 4502006
HONDACRM G 4502007
HONDACRM G 4502008
HONDACRM G 4502009
HONDATRX 450ER2006
HONDATRX 450ER2007
HONDATRX 450ER2008
HONDATRX 450ER2009
HONDATRX 450ER2010
HONDATRX 450ER2011
HONDATRX 450ER2012
HONDATRX 450ER2013
HONDATRX 450ER2014
HONDATRX 450R2006
HONDATRX 450R2007
HONDATRX 450R2008
HONDATRX 450R2009
HONDATRX 450R2010
HONDATRX 450R2011
HONDATRX 450R2012
HONDATRX 450R2013
HONDATRX 450R2014
HONDATRX ER 4502006
HONDATRX ER 4502007
HONDATRX ER 4502008
HONDATRX ER 4502009
HONDATRX ER 4502010
HONDATRX ER 4502011
HONDATRX ER 4502012
HONDATRX ER 4502013
HONDATRX ER 4502014
HONDATRX R 4502006
HONDATRX R 4502007
HONDATRX R 4502008
HONDATRX R 4502009
HONDATRX R 4502010
HONDATRX R 4502011
HONDATRX R 4502012
HONDATRX R 4502013
HONDATRX R 4502014
HONDAXR 4001996
HONDAXR 4001997
HONDAXR 4001998
HONDAXR 4001999
HONDAXR 4002000
HONDAXR 4002001
HONDAXR 4002002
HONDAXR 4002003
HONDAXR 4002004
KAWASAKIKLX 4002003
KAWASAKIKLX 4002004
KAWASAKIKLX 4002005
KAWASAKIKLX 4002006
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
100mm
Variant Id
252580
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Athena Forged Big Bore Piston Kit

Enhance the performance and reliability of your motorcycle with this Athena Forged Big Bore Piston Kit. Engineered in Italy by Athena's R&D department, this piston kit is designed for superior strength and durability.

Crafted from a special high-performance aluminum alloy with a high silicon content, Athena pistons offer excellent resistance and performance, rivaling OE specifications. The kit features advanced technical solutions and adheres to the highest quality standards.

The piston's smooth profile ensures optimal airflow and perfect flame propagation. Some piston skirts are treated with a molybdenum disulfide coating, applied by screen printing, to further reduce friction, boosting performance and extending lifespan.

This piston kit is specifically designed for Athena Big Bore cylinder kits and includes high-quality piston rings produced in Japan with wear-resistant coatings (PVD or chromium nitride) for increased durability and longevity. The rings perfectly conform to the cylinder liner, even under low tangential load, ensuring reduced friction and higher performance.

Key Features:

  • Forged Piston Type
  • Manufactured using cutting-edge CNC machining tools for precise dimensional tolerances (less than 0.01 mm).
  • Special high-performance aluminum alloy with high silicon content for enhanced reliability and resistance.
  • Molybdenum disulfide coating on some piston skirts reduces friction and improves durability.
  • Piston rings made in Japan with wear-resistant coatings for increased lifespan.
  • Kit includes piston, pin, circlips, and piston rings. All components are replaceable and interchangeable.
  • Engineered and tested on engine dynamometer benches and on track for validation under extreme conditions.
  • Designed to provide greater displacement and power.

Technical Specifications:

  • Bore Diameter: 99.95 mm
  • Piston Type: Forged
  • Number Of Segments: 2
  • Piston Pin Type: Biconical
  • Big End Pin Diameter: 19x12x51 mm
  • Compression Height: 29.00 mm
  • Compression Ratio: 11.6:1
  • Displacement: 450 cc
  • Net Weight: 0.39 Kg

Note: Products produced for greater displacement and power than those provided by road codes are intended exclusively for competitive use. Athena disclaims all responsibility for any use of the product contrary to national regulations.

Before you buy

QUESTIONS? JUST ASK

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Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details

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