Wiseco PK1875 4-Stroke Top End Piston Kit 76.80mm Bore 14.2:1 CR (40004M)

The Wiseco PK1875 is a complete top end piston kit engineered specifically for the 2010–2013 Honda CRF250R. Featuring a 76.80mm bore and a high-compression 14.2:1 compression ratio, this kit delivers everything needed for a full top end overbore or rebuild in a single package.

Key Features:

• Forged aerospace-grade aluminum piston — engineered and machined in the USA (Mentor, OH) for superior strength and durability over cast alternatives
• Armor Glide skirt coating — reduces friction and wear for extended piston life
• Optimized strength-to-weight ratio — dedicated forging design maximizes performance without unnecessary mass
• High-performance ring kit included — premium rings sized for the 76.80mm bore
• Wrist pin and circlips included — all critical piston assembly hardware in the box
• Complete top end gasket set included — everything needed to seal the top end during reassembly
• Race-proven design — trusted by top teams in Supercross, Motocross, and GNCC competition

Wiseco is the only U.S. aftermarket piston manufacturer that produces pistons exclusively via the forging process. Starting with aerospace-grade aluminum, forging compresses and aligns the material's grain structure, resulting in a piston with improved tensile strength, impact resistance, and fatigue life compared to cast pistons. The PK1875 kit is built to the tightest tolerances, ensuring a precise fit and reliable performance through hard riding and racing conditions.

Kit Includes: Forged piston, piston rings, wrist pin, circlips, and complete top end gasket set.

Piston forging reference number: 40004M