PISTON KIT 98-01 YFM600 98.00, FORGED WOSSNER 8501D300
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Wossner 98.00mm forged piston kit engineered for strength and durability. Features optimal heat transfer for efficient cooling and an elliptical design for uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany for precision and reliability. Bore Size: 98.00mm, Actual Bore Diameter: 97.93mm, Displacement: 595 cm³, Stroke: 84.00mm, Clearance: 0.07mm, Wossner Compression Ratio: 10.70:1, OEM Compression Ratio: 8.50:1, Dome Volume: -0.50 cm³, Compression Height: 28.00mm, Lock Part Number: CW22, Pin Part Number: WP009, Ring Set Part Number: 980XSY. Part No: 56-W4797+300.WO, Wossner Part No: 8501D300.
- SKU
- 56-W4797+300.WO
- Brand
- Wossner
- Availability
- Out of Stock
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 98mm
- Variant Id
- 256109
FULL DESCRIPTION
Wossner 98.00mm Forged Piston Kit
This Wossner forged piston kit is engineered for exceptional strength and durability, offering a significant upgrade for your engine. Designed for optimal heat transfer, it promotes efficient cooling within the combustion chamber, contributing to improved performance and longevity. The unique elliptical design ensures a uniform bearing surface, effectively reducing localized pressure and evenly distributing thrust loads. This intelligent design prevents piston collapse and maintains structural integrity under demanding conditions.
Key Features:
- Forged construction for superior strength and extended lifespan.
- Engineered for optimized heat transfer, enhancing cooling efficiency.
- Elliptical piston design minimizes stress and prevents collapse.
- Ensures even distribution of thrust loads for reliable operation.
- Precision manufactured in Germany to exacting quality standards.
Technical Specifications:
- Bore Size: 98.00mm
- Actual Bore Diameter: 97.93mm
- Displacement: 595 cm³
- Stroke: 84.00mm
- Clearance: 0.07mm
- Wossner Compression Ratio: 10.70:1
- OEM Compression Ratio: 8.50:1
- Dome Volume: -0.50 cm³
- Compression Height: 28.00mm
- Lock Part Number: CW22
- Pin Part Number: WP009
- Ring Set Part Number: 980XSY
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Call or email us with your make, model and year 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
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.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


