ATHENA P5F0770212009B Top End Piston Kit for Yamaha 250 YZ-F 2019–2023

Breathe new life into your 4-stroke engine with Athena's Forged Top End Piston Kit. Built for riders who demand peak performance and long-lasting reliability, this complete rebuild kit combines a precision-forged piston with Athena's premium top-end gasket kit for a seamless installation and race-ready results. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston delivers exceptional strength, superior heat resistance, and consistent power delivery, while premium Japanese piston rings and Athena's advanced gasket technology provide outstanding sealing for confidence on every ride.

• 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 smooth, reliable power delivery
• Advanced gasket materials provide dependable, leak-free sealing under demanding riding conditions

Includes:

• Forged 4-Stroke Piston
• Piston Rings (2)
• Piston Pin / Wrist Pin
• Circlips
• Complete Top End Gasket Kit

• Piston Size: 76.96mm
• Displacement: 250cc
• Compression: 13.5:1
• Piston Type: Forged
• Compression Height: 20.20mm
• Piston Pin: Standard
• Big End Pin Diameter: 16 x 9.5 x 38mm