ATHENA P4C0540118014A 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 perfectly smooth profile and specialized molybdenum disulfide skirt coating greatly reduce 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

• Complete Top End Gasket Kit

• Displacement: 125cc

• Piston Size: 53.95mm

• Pin Dimensions: 15 x 10 x 45mm

• Compression: Standard

The ATHENA P4C0540118014A Top End Piston Kit is designed for Yamaha YZ 125 models from 2005 through 2021. It provides a focused replacement solution for the motorcycle’s top-end piston assembly.

Built for applications identified as Yamaha YZ 125, this kit is suited to maintenance or top-end service work when replacing the piston. Verify the motorcycle model and model year before ordering to ensure the part number matches the intended application.

Supplied as an individual unit, the ATHENA top end piston kit is identified by part number P4C0540118014A and is sold under the ATHENA brand.

Features:

• Brand: ATHENA
• Part Number: P4C0540118014A
• Product Type: Top end piston kit
• Application: Yamaha YZ 125
• Model Years: 2005–2021
• Unit of Measure: Each