ATHENA P5F0770187008A Top End Piston Kit for Yamaha 250 WR-F / YZ-F 2014–2015

Breathe new life into your 4-stroke enduro engine with Athena's Forged Top End Piston Kit. Built for riders who demand peak performance and unwavering reliability, this complete rebuild kit pairs a precision-forged piston with Athena's premium top-end gasket kit for an easy 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, while premium Japanese piston rings and Athena's advanced gasket technology ensure a dependable seal in the toughest 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 maximum performance
• Premium Japanese piston rings with wear-resistant coatings reduce friction and extend engine life
• Forged side relief skirt design improves stability, reduces wear, and promotes smooth operation
• Premium gasket materials provide reliable, leak-free sealing under extreme 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 Ratio: 13.5:1
• Piston Type: Forged
• Skirt Design: Forged Side Relief
• Compression Height: 20.40mm
• Piston Pin: Standard
• Big End Pin Diameter: 16 x 10 x 42mm

The ATHENA P5F0770187008A Top End Piston Kit is designed for Yamaha 250 WR-F and YZ-F models from 2014 through 2015. It provides a replacement piston kit for top-end engine service on applicable motorcycles.

Built for use with the specified Yamaha applications, this kit is identified by ATHENA part number P5F0770187008A. Confirm vehicle year, model, and engine requirements before ordering to help ensure the correct application.

This product is supplied as one complete unit. Refer to the manufacturer’s service information for installation procedures and any additional components or service requirements needed for the repair.

Features:

• Brand: ATHENA
• Part Number: P5F0770187008A
• Product Type: Top end piston kit
• Application: Yamaha 250 WR-F / YZ-F
• Model Years: 2014–2015
• Unit of Measure: Each