Wiseco PK1853 4-Stroke Forged Piston Kit 80.5mm Bore 11:1 CR ArmorGlide

The Wiseco PK1853 is a 4-Stroke Forged Series Piston Kit featuring an 80.50mm bore and 11:1 compression ratio, purpose-built for the Kawasaki 650 ATV engine. Engineered, forged, and machined in the USA, this kit delivers the strength and precision demanded by high-performance ATV applications.

Wiseco pistons are forged from high-silicon, low-expansion aluminum alloy, providing superior strength, reduced weight, improved heat transfer, and extended service life compared to conventional cast pistons. The condensed, aligned grain structure of a forged piston produces higher mechanical properties and significantly greater resistance to impact and fatigue — a critical advantage under the stress of off-road riding.

Key Features:

• 80.50mm bore — oversize diameter requiring cylinder boring, sleeving, or replating
• 11:1 compression ratio for optimized power output
• ArmorGlide skirt coating reduces friction and promotes longer piston and cylinder life
• Forged in-house in the USA for consistent quality and tight manufacturing tolerances
• Optimized strength-to-weight ratio through dedicated forging design
• Improved tensile strength over cast alternatives for superior durability

Kit Includes:

• Forged piston (4782M)
• High-quality piston rings
• Wrist pin
• Circlips

Important Installation Note: This is an oversize piston. Cylinder boring, sleeving, or replating is required prior to installation. Always verify bore dimensions before ordering.