ProX Piston Kit 53.98 mm for Yamaha YZ125 (01.2217.D)

The PROX 01.2217.D Piston Kit is designed as an OEM replacement for Yamaha YZ125 applications, providing dependable fitment and performance for engine rebuilds and top-end service. Manufactured in Japan, this kit is produced to meet or exceed OEM specifications, making it a practical choice for restoring proper engine operation and maintaining consistent power delivery.
The piston is cast from a high-silicon-content aluminum alloy for strength, durability, and reliable performance under demanding operating conditions. Each piston is CNC-machined to extremely close tolerances to support accurate fitment, efficient combustion, and dependable service life. The 53.98 mm piston size is engineered for compatible Yamaha YZ125 applications and should be verified against the original piston and service specifications before installation.
Each PROX piston kit includes the essential components required for installation: one piston, a piston ring kit, a wrist pin, and circlips. Supplied as a complete top-end replacement package, the kit helps simplify maintenance and ensures that compatible components are available for the rebuild. Follow the motorcycle manufacturer’s service procedures and use qualified installation practices when replacing internal engine components.

Features:

• OEM replacement design for compatible Yamaha YZ125 applications

• Manufactured in Japan for consistent production quality

• Cast from high-silicon-content aluminum alloy

• Meets or exceeds OEM specifications

• CNC-machined to extremely close tolerances

• Includes piston, ring kit, wrist pin, and circlips

• 53.98 mm piston size

Ships from Parts Unlimited.