PISTON KIT 06-13 YFZ450 94 A, FORGED WOSSNERS 8784DA

Wossner forged piston kit with a 95.00mm bore and 94.95mm diameter, designed for Yamaha YFZ450 models. Manufactured in Germany, this piston offers superior strength and design, ensuring optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

• Forged construction for superior strength
• Optimized heat transfer for efficient combustion
• Elliptical design for uniform load distribution
• Manufactured in Germany

Specifications

• Bore: 95.00mm
• Diameter: 94.95mm
• Display (cm³): 449
• Stroke (mm): 63.40
• Clearance (mm): 0.05
• Wossner Compression Ratio: 11.60:1
• OEM Compression Ratio: 11.40:1
• Dome Volume (cm³): -8.50
• Compression Height (mm): 25.10

Cross-Reference OEM Part Numbers

• Wossner Piston Yamaha YFZ450 (PN# 8784DA)
• Lock P/N: CW20
• Pin P/N: WP029
• Ring Set P/N: 950XDS

Vehicle Fitments

• Yamaha YFZ450 (2006-2012)
• Yamaha YFZ450R (2009-Present)

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex