PISTON KIT 16-22 SXF250 78mm A, WOSSNER 8923DA KTM 79030207000
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Piston kit 78mm. Bore 77.96mm. Wossner 8923DA (STD). Wossner forged pistons are superior in strength and design. Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. Elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse. Made in Germany. Part No. 56-W265.A.WO. WOSSNER 8923DA PISTON KIT BORE 78.00. Stroke: 52.3mm. Comp. ratio: 13.9:1. Dome Volume (CC) -1.80 cm³. Comp. Height (mm) 19.5. Lock P/N CW16. Pin P/N WP070. Ring Set P/N RIK78.00. Display (cm³) 249. Hub stroke (mm) 52.30. Clearance (mm) 0.04. Wossner compression Ratio: OEM. OEM Compression ratio: 13.90:1. Dome volume (cm³) -1.80. Compression height (mm) 19.50. Theoretical weight (G) 135.00. Cross reference numbers: 79030207000, 40144M07800.
- SKU
- 56-W265.A.WO
- Brand
- Wossner
- Availability
- In Stock (3)
Fitments (34)
| Make | Model | Year |
|---|---|---|
| GAS-GAS | EX F 250 | 2021 |
| GAS-GAS | EX F 250 | 2022 |
| GAS-GAS | EX F 250 | 2023 |
| GAS-GAS | MC F 250 | 2021 |
| GAS-GAS | MC F 250 | 2022 |
| GAS-GAS | MC F 250 | 2023 |
| HUSQVARNA | FC 250 | 2016 |
| HUSQVARNA | FC 250 | 2017 |
| HUSQVARNA | FC 250 | 2018 |
| HUSQVARNA | FC 250 | 2019 |
| HUSQVARNA | FC 250 | 2020 |
| HUSQVARNA | FC 250 | 2021 |
| HUSQVARNA | FC 250 | 2022 |
| HUSQVARNA | FE 250 | 2016 |
| HUSQVARNA | FE 250 | 2017 |
| HUSQVARNA | FE 250 | 2018 |
| HUSQVARNA | FE 250 | 2019 |
| KTM | 250 EXC-F | 2016 |
| KTM | 250 EXC-F | 2017 |
| KTM | 250 EXC-F | 2018 |
| KTM | 250 EXC-F | 2019 |
| KTM | 250 SX-F | 2016 |
| KTM | 250 SX-F | 2017 |
| KTM | 250 SX-F | 2018 |
| KTM | 250 SX-F | 2019 |
| KTM | 250 SX-F | 2020 |
| KTM | 250 SX-F | 2021 |
| KTM | 250 SX-F | 2022 |
| KTM | 250 XC-F | 2016 |
| KTM | 250 XC-F | 2017 |
| KTM | 250 XC-F | 2018 |
| KTM | 250 XC-F | 2019 |
| KTM | 250 XC-F | 2020 |
| KTM | 250 XC-F | 2021 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 78mm
- Variant Id
- 255312
FULL DESCRIPTION
Wossner 78mm Piston Kit STD Bore 77.96mm
Upgrade your engine's performance with this high-quality Wossner Piston Kit. Engineered for superior strength and heat transfer, this kit is designed to optimize combustion chamber efficiency and ensure even load distribution for enhanced durability.
Key Features:
- Forged Strength: Wossner forged pistons offer exceptional strength and advanced design for demanding applications.
- Optimized Heat Transfer: Engineered to efficiently transfer combustion heat to cylinder walls for improved performance and longevity.
- Elliptical Design: Provides a more uniform bearing surface under heat expansion, eliminating localized pressure and distributing thrust loads evenly to prevent piston collapse.
- Precision Manufacturing: Made in Germany to exacting standards for reliable performance.
- Standard Bore Size: This kit features a standard bore of 77.96mm, suitable for a 78mm piston.
- Compression Ratio: Achieves a 13.9:1 compression ratio, matching OEM specifications.
- Included Components: Comes with lock pin CW16, pin WP070, and ring set RIK78.00 for a complete installation.
- Engine Displacement: Suitable for 249cc engines.
Specifications:
- Piston Diameter: 78mm
- Bore: 77.96mm
- Stroke: 52.3mm
- Compression Height: 19.5mm
- Dome Volume: -1.80 cm³
- Theoretical Weight: 135.00g
- Piston Clearance: 0.04mm
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.