WOSSNER 95mm FORGED PISTON KIT A,YAMAHA YFZ450/R/X 2009-2023

The Wossner 8601DA forged piston kit features a 95.00mm bore and is designed for Yamaha YFZ450 models from 2004 to 2005. Manufactured in Germany, this piston is built for optimal strength, heat transfer, and durability under high-performance conditions. Its elliptical shape ensures even pressure distribution and minimizes the risk of piston collapse due to thermal expansion.

Features

• Forged piston construction for enhanced strength and durability
• Designed for efficient heat transfer from the combustion chamber to cylinder walls
• Elliptical profile provides uniform bearing surface under heat expansion
• Reduces localized pressure and prevents piston collapse
• Manufactured in Germany

Specifications

• Bore: 95.00 mm
• Actual Bore Diameter: 94.95 mm
• Display: 449 cm³
• Hub Stroke: 62.00 mm
• Clearance: 0.05 mm
• Compression Height: 25.00 mm
• Dome Volume: -7.40 cm³
• Compression Ratio: OEM (11.90:1)
• Theoretical Weight: Not specified

Cross-Reference OEM Part Numbers

• Piston: 8601DA
• Lock: CW20
• Pin: WP038
• Ring Set: 950XSY
• Rod: P4029
• Part No.: 56-W4865+00A.WO
• OEM Reference: 5TG-11631-12-00, 4865M09500

Vehicle Fitments

• Yamaha YFZ450 2004–2005

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.