Brake Parts
Cooling Parts
Drivetrain & Transmission Parts
Electrical Parts
Engines Parts
Exhaust Parts
Foot Controls & Pegs
Frame & Body
Fuel Parts
Handlebars & Controls
Ignition System Parts
Mounts & Hardware
Performance Chips & Programmers
Racing Exterior & Body Parts
Starting & Charging Parts
Suspension Parts
Windshield & Fairings
Repair Manuals
Brake Parts
Cooling Parts
Drivetrain & Transmission Parts
Electrical Parts
Engines Parts
Exhaust Parts
Foot Controls & Pegs
Frame & Body
Fuel Parts
Handlebars & Controls
Ignition System Parts
Mounts & Hardware
Performance Chips & Programmers
Racing Exterior & Body Parts
Starting & Charging Parts
Suspension Parts
Windshield & Fairings
Repair Manuals
Breathe new life into your 4-stroke enduro engine with Athena's Forged Top End Piston Kit. Designed for riders who demand race-proven performance and uncompromising reliability, this complete rebuild kit pairs a precision-forged piston with Athena's premium top-end gasket kit for a seamless installation and dependable results. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston delivers exceptional strength, superior heat resistance, and responsive power, while premium Japanese piston rings and Athena's advanced gasket technology provide outstanding sealing for maximum confidence on every ride. Compatible with Athena's Racing DLC Wrist Pin (sold separately) for riders looking to further reduce friction and enhance durability.
- Complete top-end rebuild kit featuring a forged 4-stroke piston and premium gasket set
- Reverse-extruded forged aluminum piston for exceptional strength and durability
- Precision CNC-machined for OEM-quality fit and consistent performance
- Premium Japanese piston rings with wear-resistant coatings reduce friction and extend engine life
- Optimized piston design promotes efficient combustion and responsive power delivery
- Advanced gasket materials provide dependable, leak-free sealing under demanding enduro conditions
- Compatible with Athena Racing DLC Wrist Pin (Item #S41317088) for enhanced performance
Includes:
- Forged 4-Stroke Piston
- Piston Rings (2)
- Piston Pin / Wrist Pin
- Circlips
- Complete Top End Gasket Kit
- Piston Size: 79.96mm
- Displacement: 250cc
- Compression: 13.9:1
- Piston Type: Forged
- Compression Height: 18.90mm
- Piston Pin: Biconical
- Big End Pin Diameter: 16 x 9 x 39.9mm
- Compatible with Athena Racing DLC Wrist Pin #S41317088 (sold separately)
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.
CLOSE ✕
Subscribe to our newsletter to receive exclusive offers, product recommendations, expert tips and more.