PISTON KIT 08-12 WR250X 77.00, COMP. 13.5:1 WOSSNER 8729DA
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Wossner forged piston kit with a 77.00mm bore and 76.96mm diameter. 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, and an elliptical design for uniform load distribution. Specifications include a bore of 77.00mm, diameter of 76.96mm, display of 249 cm³, stroke of 53.60mm, clearance of 0.04mm, OEM compression ratio of 11.80:1, dome volume of -5.90 cm³, and compression height of 22.90mm. Cross-reference OEM part numbers include Wossner Piston Yamaha WR250X (PN# 8729DA), Lock P/N: CW17, Pin P/N: WP083, and Ring Set P/N: 770XAS-2.
- SKU
- 56-W238+00A.WO
- Brand
- Wossner
- Availability
- In Stock (2)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 77mm
- Variant Id
- 255147
FULL DESCRIPTION
Wossner Forged Piston Kit for WR250X
Upgrade your WR250X with this high-performance forged piston kit from Wossner. Engineered for superior strength and optimal performance, this piston is designed to enhance your motorcycle's combustion efficiency and durability. Manufactured with precision in Germany, Wossner pistons are renowned for their advanced design and robust construction.
The piston features an innovative elliptical design that ensures a uniform bearing surface even under extreme heat expansion. This design effectively reduces localized pressure points and evenly distributes thrust loads, preventing piston collapse and promoting longevity. Experience improved heat transfer to the cylinder walls, leading to more efficient combustion and reliable power delivery.
Key Features:
- Forged Construction: Provides exceptional strength and resistance to stress.
- Optimized Heat Transfer: Enhances combustion efficiency and engine cooling.
- Elliptical Design: Guarantees uniform load distribution and prevents localized pressure.
- Precision Manufacturing: Made in Germany to the highest quality standards.
Specifications:
- Bore: 77.00mm
- Diameter: 76.96mm
- Display (cm³): 249
- Stroke (mm): 53.60
- Clearance (mm): 0.04
- Compression Ratio (Wossner): OEM
- Compression Ratio (OEM): 11.80:1
- Dome Volume (cm³): -5.90
- Compression Height (mm): 22.90
Included Components:
- Wossner Piston (Part Number: 8729DA)
- Lock P/N: CW17
- Pin P/N: WP083
- Ring Set P/N: 770XAS-2
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