Wiseco Pro-Lite Piston Kit (+2mm Over) | Yamaha YZ125 (2005–2021) 845M05600

Boost the displacement and power of your Yamaha with the Wiseco 845M05600 Piston Kit. Engineered for the 2005–2021 Yamaha YZ125, this kit is designed for riders looking to push performance with a +2mm overbore, bringing the total bore size to 56.00mm.

Features

• Big Bore Performance: Precision-machined to 56.00mm (+2mm over stock) for increased displacement and improved torque.

• Forged Strength: High-silicon alloy provides superior structural integrity and expanded life cycles under racing conditions.

• Race-Ready Profile: CNC-machined cam and barrel shapes result in less friction and more consistent power delivery.

• Lightweight Design: Optimized weight for faster throttle response and reduced vibration.

Specifications

• Bore Diameter: 56.00mm (+2mm Oversize)

• Displacement: Increased for 125cc class (Requires cylinder boring)

• Part Number: 845M05600

• Fitment: Yamaha YZ125 (Years 2005 through 2021)

Included! 📦 We provide to the lower 48 states. (Note: We currently do not ship to Alaska, Hawaii, Guam, or Puerto Rico.

Performance & Durability

As part of Wiseco's Pro-Lite Series, this piston is forged from high-silicon aluminum alloy. The forging process creates a much stronger part than standard casting, allowing it to withstand the higher heat and higher RPMs required in competitive 2-stroke racing.

Complete Kit Includes:

• 1x Forged Pro-Lite Piston

• High-Performance Ring Set

• Wrist Pin

• Round Wire Circlips

Technical Note: This is an Oversize Piston. Your cylinder must be bored and replated (if applicable) to 56.00mm to utilize this kit.