Wiseco PK1367 Top End Piston Kit 96mm 13:1 CR Honda CRF450R

The Wiseco PK1367 is a complete top end piston kit engineered specifically for the Honda CRF450R, delivering a 96mm bore and an aggressive 13:1 compression ratio (piston number 4822M) for maximum 4-stroke performance. Designed, forged, and machined in the USA at Wiseco's Mentor, OH facility, this kit is built to the tightest tolerances for an optimal combination of power and reliability.

Wiseco's forged pistons utilize a dedicated aerospace alloy forging process that produces a condensed, aligned grain structure — delivering superior mechanical strength, impact resistance, and fatigue resistance compared to cast alternatives. Each piston is CNC machined to an optimal cam shape and profile for peak horsepower output and long service life.

Kit Includes:

• Forged piston (4822M) — dedicated aerospace alloy forging, CNC machined
• High-performance ring set — extended service life and sustained power output
• Alloy wrist pin — precision machined for consistent strength and reduced friction
• Circlips — precision fit for secure piston pin retention
• Complete top end gasket kit — premium materials exceeding OEM sealing standards
• Top end needle bearing — precision machined for strength and reduced friction

Race-proven at every level of competition — from Supercross and Motocross to GNCC and beyond — Wiseco PK kits are trusted by top factory race teams worldwide. The PK1367 gives you everything needed to complete a proper top end rebuild in a single kit.