Wiseco 40132M05850 Forged Piston Kit Bore CR - 4-Stroke 58.50mm 10 1

The Wiseco 40132M05850 is a high-performance forged piston kit featuring a 58.50mm bore (1.2mm oversize) and 10:1 compression ratio, engineered for the Honda CRF150F. Part of Wiseco's 4-Stroke Forged Series, this piston kit delivers a significant upgrade over stock cast components.

Key Features:

• Aerospace-grade forged aluminum construction — forging compresses material molecules for greater density, superior impact resistance, and fatigue strength compared to cast pistons
• ArmorGlide skirt coating — dry-film lubricant permanently bonded to the piston skirt to reduce friction, improve performance, and quiet piston noise in the bore
• Dedicated forging design — optimized strength-to-weight ratio specific to this engine application for maximum horsepower and torque output
• CNC diamond-turned finish — precision machining ensures consistent sizing with no variation across the piston surface
• Compatible with all cylinder bore compositions — suitable for cast iron, chrome, Nikasil, and boron composite cylinders
• Complete kit includes: forged piston, high-performance ring set, alloy wrist pin, and circlips

Specifications:

• Bore Size: 58.50mm (+1.2mm oversize)
• Compression Ratio: 10:1
• Series: 4-Stroke Forged
• MPN: 40132M05850

Note: This is an oversize piston. Cylinder boring or sleeving is required prior to installation. Always inspect and measure your cylinder before ordering. Wiseco pistons are engineered and manufactured in Mentor, OH, USA.