PISTON KIT YZ 250F 2019 76.96 A, WOSSNER 8957DA, B7B-11631-00-00
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Wossner Forged Piston Kit 8957DA is engineered for strength, efficient heat transfer, and consistent load distribution. Its elliptical design minimizes localized stress and prevents piston collapse under high-performance conditions. Manufactured in Germany, this forged construction enhances durability. Specifications include a 77mm (STD) piston size, kit part number 56-W8812.A.WO, and Wossner part number 8957DA. Cross-reference OEM part number B7B-11631-00-00.
- SKU
- 56-W8812.A.WO
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (28)
| Make | Model | Year |
|---|---|---|
| FANTIC | XEF 250 | 2021 |
| FANTIC | XEF 250 | 2022 |
| FANTIC | XEF 250 | 2023 |
| FANTIC | XEF 250 | 2024 |
| FANTIC | XXF 250 | 2022 |
| FANTIC | XXF 250 | 2023 |
| FANTIC | XXF 250 | 2024 |
| YAMAHA | WR 250F | 2020 |
| YAMAHA | WR 250F | 2021 |
| YAMAHA | WR 250F | 2022 |
| YAMAHA | WR 250F | 2023 |
| YAMAHA | WR 250F | 2024 |
| YAMAHA | WR 250F | 2025 |
| YAMAHA | YZ 250F | 2019 |
| YAMAHA | YZ 250F | 2020 |
| YAMAHA | YZ 250F | 2021 |
| YAMAHA | YZ 250F | 2022 |
| YAMAHA | YZ 250F | 2023 |
| YAMAHA | YZ 250F | 2024 |
| YAMAHA | YZ 250F | 2025 |
| YAMAHA | YZ 250FX | 2020 |
| YAMAHA | YZ 250FX | 2021 |
| YAMAHA | YZ 250FX | 2022 |
| YAMAHA | YZ 250FX | 2023 |
| YAMAHA | YZ 250FX | 2024 |
| YAMAHA | YZ 250FX | 2025 |
| YAMAHA | YZF 250 | 2018 |
| YAMAHA | YZF 250 | 2019 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 76.96mm
- Variant Id
- 288406
FULL DESCRIPTION
Wossner Forged Piston Kit for Yamaha YZ250F
This Wossner Forged Piston Kit features a standard 77mm bore, meticulously engineered in Germany for high-performance applications. The forged construction provides superior strength and durability, while the advanced design promotes efficient heat transfer to the cylinder walls. Its unique elliptical skirt profile is crucial for minimizing localized stress and ensuring even thrust load distribution, which helps prevent piston collapse even under demanding operating conditions.
Key Features:
- Forged construction for enhanced strength and longevity.
- Optimized for efficient combustion heat transfer.
- Elliptical skirt design for uniform thrust load distribution.
- Precision manufactured in Germany.
Specifications:
- Piston Size: 77mm (STD)
- Wossner Part Number: 8957DA
- Piston Type: Forged
Cross-Reference OEM Part Number:
- B7B-11631-00-00
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