PISTON KIT 13-15 SXF250 78mm A, WOSSNER 8865DA KTM 77730007100
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Piston kit 78.00mm bore. Wossner 8865DA. 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. Display 249 cm3. Hub stroke 53.60mm. Clearance 0.04mm. Wossner compression ratio OEM 13.90:1. Dome volume -2.10 cm3. Compression height 19.50mm. Weight 236g. Cross reference numbers: 77730007100, 4981M07600.
- SKU
- 56-W954.A.WO
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (39)
| Make | Model | Year |
|---|---|---|
| GAS-GAS | EC F 250 | 2021 |
| GAS-GAS | EC F 250 | 2022 |
| GAS-GAS | EC F 250 | 2023 |
| HUSABERG | FE 250 | 2014 |
| HUSQVARNA | FC 250 | 2014 |
| HUSQVARNA | FC 250 | 2015 |
| HUSQVARNA | FE 250 | 2014 |
| HUSQVARNA | FE 250 | 2015 |
| HUSQVARNA | FE 250 | 2016 |
| HUSQVARNA | FE 250 | 2017 |
| HUSQVARNA | FE 250 | 2018 |
| HUSQVARNA | FE 250 | 2019 |
| HUSQVARNA | FE 250 | 2020 |
| HUSQVARNA | FE 250 | 2021 |
| HUSQVARNA | FE 250 | 2022 |
| HUSQVARNA | FE 250 | 2023 |
| KTM | 250 EXC-F | 2014 |
| KTM | 250 EXC-F | 2015 |
| KTM | 250 EXC-F | 2016 |
| KTM | 250 EXC-F | 2017 |
| KTM | 250 EXC-F | 2018 |
| KTM | 250 EXC-F | 2019 |
| KTM | 250 EXC-F | 2020 |
| KTM | 250 EXC-F | 2021 |
| KTM | 250 EXC-F | 2022 |
| KTM | 250 EXC-F | 2023 |
| KTM | 250 FREERIDE F | 2018 |
| KTM | 250 FREERIDE F | 2019 |
| KTM | 250 FREERIDE F | 2020 |
| KTM | 250 FREERIDE R | 2018 |
| KTM | 250 FREERIDE R | 2019 |
| KTM | 250 FREERIDE R | 2020 |
| KTM | 250 SX-F | 2013 |
| KTM | 250 SX-F | 2014 |
| KTM | 250 SX-F | 2015 |
| KTM | 250 XC-F | 2013 |
| KTM | 250 XC-F | 2014 |
| KTM | 250 XCF-W | 2013 |
| KTM | 250 XCF-W | 2014 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 78.00mm
- Variant Id
- 258383
FULL DESCRIPTION
Wossner 78mm Standard Bore Piston Kit
This Wossner piston kit features a 78.00mm standard bore and is engineered for superior strength and design. It is meticulously crafted to optimize combustion chamber heat transfer to the cylinder walls, ensuring efficient engine operation. The elliptical design provides a more uniform bearing surface under heat expansion, preventing localized pressure and distributing thrust loads evenly for enhanced durability.
Key Features:
- Forged piston for exceptional strength.
- Engineered for optimal heat transfer.
- Elliptical design for uniform bearing surface and even thrust load distribution.
- Prevents piston collapse and localized pressure.
- Made in Germany.
- Standard Compression Ratio: OEM (13.90:1)
- Dome Volume: -2.10 cm3
- Compression Height: 19.50 mm
- Clearance: 0.04 mm
- Hub Stroke: 53.60 mm
- Theoretical Weight: 236 grams
This piston kit is a direct replacement for specific OEM part numbers, including 77730007100 and 4981M07600.
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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.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. 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
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