Yamaha WR 125 [PROX] – piston kit for 4-stroke

Piston kit for Yamaha WR 125 – PROX

The piston kit from PROX is specially designed for the 4-stroke engine of the Yamaha WR 125. It offers a precise fit and high material quality that meets the requirements of modern motorcycle engines.

Technical features

• Brand: PROX
• Engine type: 4-stroke
• Bore size: 77.00mm (standard size)
• Piston size: 76.96mm
• Displacement: 250cc
• Compression ratio: 12,5:1
• Piston material: Forged aluminum alloy
• Coating of piston skirt: Uncoated
• Scope of delivery: Piston set (piston and piston rings)
• Type: Standard size B

Product description

The piston kit consists of a high-quality, forged aluminum piston that was developed for use in the 4-stroke engine of the Yamaha WR 125. The precisely manufactured piston size of 76.96 mm fits perfectly to the bore of 77.00 mm and ensures precise function in the engine.

The piston skirt is uncoated, which is a proven solution for use under normal operating conditions. The combination of material and manufacturing ensures good thermal conductivity as well as high strength and longevity.

The compression ratio of 12.5:1 supports efficient combustion and contributes to the engine's performance. The piston kit is delivered as a complete set and, in addition to the piston, also contains the matching piston rings, which ensure optimal sealing in the combustion chamber.

The use of this piston set allows precise repair or maintenance of the engine and helps restore the original engine performance. The standard B size ensures that the piston meets the original specifications.