ATHENA P5F0770187008B 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. Designed for riders who expect maximum performance and reliability, this complete rebuild kit pairs a precision-forged piston with Athena's premium top-end gasket kit for a hassle-free installation and race-proven durability. Manufactured using a reverse extrusion forging process and precision CNC machining, the piston delivers exceptional strength, superior heat resistance, and consistent power output, while premium Japanese piston rings and Athena's advanced gasket technology provide outstanding sealing and long-lasting performance.

• Complete top-end rebuild kit featuring a forged 4-stroke piston and premium gasket set
• Reverse-extruded forged aluminum piston for maximum 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
• Forged side relief skirt design improves stability, reduces wear, and promotes smooth engine operation
• Premium 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: 76.97mm
• Displacement: 250cc
• Compression: 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 P5F0770187008B Top End Piston Kit is designed for Yamaha 250 WR-F and YZ-F models from 2014 through 2015. This kit provides a replacement piston solution for the top end of the specified engine applications.

Manufactured by ATHENA, the kit is identified by part number P5F0770187008B and is supplied as one unit. Verify the part number and model-year application before ordering to help ensure it matches your Yamaha motorcycle.

Features:

• Brand: ATHENA
• Part Number: P5F0770187008B
• Product Type: Top end piston kit
• Application: Yamaha 250 WR-F / YZ-F
• Model Years: 2014–2015
• Unit of Measure: Each