Wiseco 841M05700 GP Series 2-Stroke Forged Piston Kit 57mm Bore

The Wiseco 841M05700 is a GP Series forged 2-stroke piston kit engineered for the Honda CR125R. Wiseco's GP Series forged 2-stroke pistons build on a proven performance foundation and incorporate performance and durability enhancing features including an Electra-Coated crown, ring grooves, and pin bores, plus ArmorGlide skirt coating, making this an outstanding choice for both sustained competition and hard recreational riding.

This piston kit features a 57.00mm bore and is engineered, forged, and machined in the USA in Mentor, OH, and designed with optimized features for long service life and top-end power.

Key Features:

• GP Series Forged Construction — Builds on the tried-and-true Pro-Lite base with next-level durability enhancements
• Electra-Coated Crown, Ring Grooves & Pin Bores — Resists wear, combustion heat damage, and ring micro-welding
• ArmorGlide Skirt Coating — Reduces friction to optimize performance potential
• USA Made — Engineered, forged, and machined in the USA in Mentor, OH
• Compatible Cylinder Bores — Designed for use in cast iron, chrome, Nikasil, and boron composite cylinder compositions
• Complete Kit — Includes piston, rings, circlips, and wrist pin

The GP Series 2-stroke pistons are perfect for endurance and sustained-RPM 2-stroke applications, ideal from play riders putting in hard hours to consistent competition. The 841M05700 is also available in multiple oversizes to accommodate cylinder bore restoration and performance builds.