Wiseco PK1395 GP Series 2-Stroke Top End Piston Kit 56mm +2mm Overbore

The Wiseco PK1395 is a GP Series top end piston kit engineered for the 2004 Honda CR125R, delivering a 56.00mm (+2mm overbore) forged piston solution for two-stroke motocross and off-road racing engines. Wiseco forges all of their pistons in-house in the USA, controlling every step of the manufacturing process from raw bar stock to finished part.

The GP Series piston design features less machining on the outside of the piston, which helps seal the bore for increased compression and improved combustion efficiency. The Electra-Coated crown, ring grooves, and pin bores provide maximum wear resistance and protection against micro-welding, galling, and detonation. Wiseco's ArmorGlide® skirt coating reduces friction and noise for greater horsepower potential while simplifying fitment — simply confirm your bore size and install.

Kit Contents:

• Forged GP Series piston (56.00mm bore / +2mm oversize)
• High-quality piston ring(s)
• Wrist pin
• Circlips
• Top end gasket set

Key Features:

• GP Series design — reduced exterior machining seals the bore for higher compression output
• Electra-Coat treatment on crown, ring grooves, and pin bores for protection against detonation and galling
• ArmorGlide® skirt coating minimizes friction and reduces piston noise
• Engineered and forged in the USA to strict quality tolerances
• All hardware manufactured by Wiseco for guaranteed fit and performance
• Nikasil-bore cylinders will require sleeving or replating prior to installation

Wiseco piston rings are application-specific and are not interchangeable with other brands or ring types. This complete kit provides everything needed for a professional-quality top end rebuild on the 2004 Honda CR125R.