PISTON KIT YFM YFB250 71.50, WOSSNER FORGED 8659D050
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Wossner 71.50mm Bore Forged Piston Kit (Part No. 8659D050). High-strength forged piston construction. Optimized heat transfer for improved combustion efficiency. Elliptical design for even thrust load distribution. Manufactured in Germany. Bore Size: 71.50mm. Actual Bore Diameter: 71.44mm. Compression Ratio: OEM. OEM Compression Ratio: 9.50:1. Displacement: 229cc. Stroke: 58.00mm. Clearance: 0.06mm. Dome Volume: -4.70cm³. Compression Height: 23.80mm. Lock P/N: CW16. Pin P/N: WP041. Ring Set P/N: 715XDS.
- SKU
- 56-W4675+050.WO
- Brand
- Wossner
- Availability
- In Stock (2)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 71.5mm
- Variant Id
- 255887
FULL DESCRIPTION
Wossner 71.50mm Bore Forged Piston Kit
Enhance your engine's performance and durability with the Wossner 71.50mm Bore Piston Kit. This high-performance, German-manufactured forged piston is engineered for optimal strength and longevity, designed to fit specific Yamaha models.
Key Features:
- High-Strength Forged Construction: Built for superior durability and resistance to extreme conditions.
- Optimized Heat Transfer: Promotes efficient heat management within the combustion chamber for improved performance.
- Elliptical Design: Ensures even load distribution across the piston, reducing localized pressure and preventing collapse.
- OEM Compression Ratio: Designed to maintain the original factory compression ratio for reliable engine operation.
- German Engineering: Manufactured to exacting standards in Germany for quality and precision.
Specifications:
- Bore Size: 71.50mm
- Actual Bore Diameter: 71.44mm
- Compression Ratio: OEM
- OEM Compression Ratio: 9.50:1
- Displacement: 229cc
- Stroke: 58.00mm
- Clearance: 0.06mm
- Dome Volume: -4.70cm³
- Compression Height: 23.80mm
This kit includes necessary components for a complete piston replacement. Please verify compatibility with your specific vehicle.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Call or email us with your make, model and year 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.