Wiseco Piston Kit, 57.00 mm for Yamaha YZ125 (559M05700)

Upgrade your Yamaha YZ125 2-stroke engine with the WISECO 559M05700 Piston Kit, engineered for dependable all-purpose riding performance. This piston kit is designed to support durability, longevity, and increased horsepower while maintaining the responsive characteristics expected from a high-performance replacement component. Its application-specific design makes it a practical choice for riders seeking consistent engine performance and reliable service life.
The WISECO 559M05700 features a dedicated forging design that optimizes strength-to-weight balance. Additional lightening operations help reduce reciprocating mass for enhanced throttle response, allowing the engine to react more quickly to rider input. The 57.00 mm piston size is designed specifically for compatible Yamaha YZ125 applications, making proper application verification essential before installation.
Engineered, forged, and machined in the USA, this WISECO piston is manufactured with attention to performance, fit, and durability. The piston is made in the USA and provides a quality replacement solution for maintenance, rebuilding, or performance-focused engine work. Professional installation is recommended, including verification of cylinder condition, piston-to-cylinder clearance, ring gap, and all manufacturer service requirements.

Features:

• Application: Designed for all-purpose 2-stroke riding

• Performance: Supports durability, longevity, and increased horsepower

• Construction: Dedicated forging design optimized for strength-to-weight balance

• Throttle Response: Additional lightening operations help enhance engine response

• Manufacturing: Engineered, forged, and machined in the USA

• Origin: Piston is made in the USA

• Compatibility: Designed for compatible Yamaha YZ125 applications

• Part Number: 559M05700

Ships from Parts Unlimited.