Wiseco PK1118 66.5mm Forged Piston Top-End Kit 10.25:1 CR Honda XR185 XR200

The Wiseco PK1118 is a high-performance forged top-end piston kit built specifically for the 1980–1983 Honda XR185 and XR200 (Forging Code 4156M). Featuring a 66.50mm bore and a 10.25:1 compression ratio, this kit delivers the strength and precision needed for demanding 4-stroke dirt bike applications.

Kit Includes:

• Forged piston (66.50mm / 2.618")
• Piston rings
• Wrist pin
• Circlips
• Top-end gasket kit

Key Features:

• USA-made forging: Engineered, forged, and machined in Mentor, OH for consistent quality and tight tolerances
• Dedicated forging design: Built specifically for the Honda XR185/XR200 engine for an optimized strength-to-weight ratio
• Improved tensile strength: Forged aluminum construction delivers superior impact and fatigue resistance versus cast pistons
• 4-stroke design: Features a race-ready dome finish with smooth edges for improved combustion flow
• Non-coated skirt
• Forging number: 4156M

Wiseco forged pistons are the choice of professional race teams across Supercross, Motocross, GNCC, and more. By controlling every stage of manufacturing — from raw material to finished part — Wiseco ensures each piston meets exacting performance standards. Note: Wiseco pistons must be used with Wiseco rings; ring types are not interchangeable between product lines. Cylinder sleeves must be purchased separately.