ATHENA P5F0770187009A Top End Piston Kit for Yamaha 250 WR-F / YZ-F 2016–2018

Breathe new life into your 4-stroke enduro engine with Athena's Forged Top End Piston Kit. Engineered for serious riders, this complete rebuild kit combines a precision-forged piston with Athena's premium top-end gasket kit to deliver maximum performance, durability, and reliability. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston offers exceptional strength, improved heat resistance, and smooth power delivery, while premium Japanese piston rings and Athena's advanced gasket technology provide a dependable seal for long-lasting engine performance.

• 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 reliable performance
• Premium Japanese piston rings with wear-resistant coatings reduce friction and extend engine life
• Optimized piston design delivers efficient combustion and consistent power output
• High-quality 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: 76.95mm
• 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

The ATHENA P5F0770187009A Top End Piston Kit is designed for Yamaha 250 WR-F and YZ-F models from 2016 through 2018. This kit provides a replacement piston assembly for the engine’s top end.

Manufactured by ATHENA, the kit is identified by part number P5F0770187009A and is supplied as one unit. Confirm the part number and motorcycle model year before ordering to help ensure the correct application.

Features:

• Application: Yamaha 250 WR-F / YZ-F models from 2016–2018
• Product Type: Top end piston kit
• Brand: ATHENA
• Part Number: P5F0770187009A
• Unit of Measure: Each