ATHENA P4C0540118014B Top End Piston Kit for Yamaha YZ 125, 2005–2021

Breathe new life into your 125cc 2-stroke engine with this ultimate, all-in-one top-end rebuild kit. Athena has perfectly paired a premium, gravity-cast high-silicon aluminum piston with their industry-leading top-end gaskets for a seamless and highly reliable rebuild. The precision CNC-machined piston ensures flawless fuel flow and optimal flame propagation, while a specialized molybdenum disulfide skirt coating greatly reduces internal friction for enhanced power and longevity. Accompanied by gaskets that have undergone advanced stress-relieving processes and proprietary surface treatments, this kit guarantees an unbeatable seal under extreme cylinder pressures. Reclaim your factory compression and hit the track with maximum performance!

• Complete top-end solution perfectly pairing a cast 2-stroke piston and comprehensive gasket kit

• Gravity-cast from a specialized high-silicon aluminum alloy for exceptional strength and heat resistance

• Molybdenum disulfide skirt coating drastically reduces friction and internal engine wear

• Precision CNC-machined profile ensures optimal fuel flow and perfect flame propagation

• Advanced gaskets feature proprietary surface treatments and stress-relieving processes for maximum sealing reliability

Includes:

• Cast 2-Stroke Piston (Flat Head)

• Piston Ring (1)

• Standard Piston Pin / Wrist Pin (15x10x45mm)

• Complete Top End Gasket Kit

• Displacement: 125cc

• Piston Size: 53.96mm (B-Size)

• Compression: Standard

The ATHENA P4C0540118014B Top End Piston Kit is designed for Yamaha YZ 125 models from 2005 through 2021. This kit provides a piston-focused solution for top-end service using a product matched to the specified Yamaha YZ 125 application range.

Built for use in the top end of the engine, the ATHENA piston kit is identified by part number P4C0540118014B for straightforward product selection and service planning. Its application-specific design supports replacement work on compatible Yamaha YZ 125 models within the stated model years.

Sold as one each, this ATHENA top end piston kit is suitable for maintenance or repair projects requiring a replacement piston kit for the listed Yamaha YZ 125 application. Verify the model year and application before ordering to ensure the part matches your service needs.

Features:

• Brand: ATHENA
• Part Number: P4C0540118014B
• Product Type: Top end piston kit
• Application: Yamaha YZ 125
• Model Years: 2005–2021
• Unit of Measure: Each