PISTON KIT 01-04 YZF250 77.00 8572DA WOSSNER 2-RING

Wossner forged piston kit designed for superior strength and performance. Engineered for optimal heat transfer from the combustion chamber to cylinder walls. The elliptical design ensures uniform bearing surface under heat expansion, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany.

Features

• Forged construction for enhanced durability
• Optimized heat transfer for improved performance
• Elliptical design prevents localized pressure and piston collapse
• Pro Series design with a two-ring configuration for enhanced sealing and longevity

Specifications

• Bore: 76.96 mm
• Piston Size: 77.00 mm
• Displacement: 249 cm³
• Stroke: 53.60 mm
• Clearance: 0.04 mm
• Wossner Compression Ratio: 12.80:1
• OEM Compression Ratio: 12.50:1
• Dome Volume: -4.80 cm³
• Compression Height: 20.50 mm

Cross-Reference OEM Part Numbers

• Lock: CW16
• Pin: WP059
• Ring Set: 770XAS
• Rod: P4006 / P4005
• OEM Part Number: 5NL-11631-10-00

Vehicle Fitments

• Yamaha YZF250 (2001-2004)
• Yamaha WR250F (2001-2004)

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.