ATHENA P5F0970213005B Top End Piston Kit for Yamaha 450 YZ-F 2020–2022

Breathe new life into your 4-stroke enduro engine with Athena's Forged Top End Piston Kit. Engineered 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 long-lasting durability. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston delivers exceptional strength, superior heat resistance, and smooth, responsive power delivery, while premium Japanese piston rings and Athena's advanced gasket technology provide outstanding sealing for dependable performance in the harshest riding conditions.

• 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
• Three-ring piston design enhances oil control, sealing, and long-term durability
• Advanced gasket materials provide dependable, leak-free sealing for demanding enduro applications

Includes:

• Forged 4-Stroke Piston
• Piston Rings (3)
• Piston Pin / Wrist Pin
• Circlips
• Complete Top End Gasket Kit

• Piston Size: 96.96mm
• Displacement: 449cc
• Compression: 13.7:1
• Piston Type: Forged
• Compression Height: 24.00mm
• Piston Pin: Biconical
• Big End Pin Diameter: 18 x 10 x 48.8mm