ProX Piston Kit for Yamaha YZ125 (01.2217.B)

The PROX 01.2217.B Piston Kit is a precision-engineered OEM replacement solution for select Yamaha YZ125 applications. Manufactured in Japan, this kit is designed to deliver dependable fit, consistent performance, and long-term durability for motorcycle engine rebuilds and maintenance. It provides a practical replacement for worn or damaged piston components while helping restore proper engine operation.
Constructed from a high-silicon-content aluminum alloy, the PROX piston is cast to meet or exceed OEM specifications. The piston is then CNC-machined to extremely close tolerances, supporting accurate installation and reliable operation within the engine. This manufacturing process helps promote consistent combustion performance, reduced wear, and dependable service under demanding riding conditions.
The kit includes the piston, ring kit, wrist pin, and circlips needed for a complete piston replacement. Supplied components are matched for convenient installation and are suited to professional repairs, engine rebuilds, and maintenance performed by experienced powersports technicians. Verify vehicle fitment and service requirements before installation to ensure compatibility with your Yamaha YZ125 and related engine components.

Features:

• Manufactured in Japan for consistent quality and dependable performance

• OEM replacement design for select Yamaha YZ125 applications

• Cast from high-silicon-content aluminum alloy to meet or exceed OEM specifications

• CNC-machined to extremely close tolerances for accurate fit and reliable operation

• Complete kit includes piston, ring kit, wrist pin, and circlips

Ships from Parts Unlimited.