PISTON KIT 76-79 YZ250 71.00, FORGED WOSSNER 8179D100
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Wossner forged piston kit with a 71.00mm bore and 70.94mm 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 include forged construction for superior strength, optimized heat transfer for efficient combustion, and an elliptical design for uniform load distribution. Specifications include: Bore: 71.00mm, Diameter: 70.94mm, Display (cm³): 246, Stroke (mm): 64.00, Clearance (mm): 0.06, Compression Ratio: 2-Stroke, Compression Height (mm): 33.00. Cross-reference OEM Part Numbers: Wossner Piston Yamaha YZ250 (PN# 8179D100), Lock P/N: CW18, Pin P/N: WP033, Ring Set P/N: RSB7100 x 2.
- SKU
- 56-W234+100.WO
- Brand
- Wossner
- Availability
- In Stock (2)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 71mm
- Variant Id
- 255132
FULL DESCRIPTION
Wossner Forged Piston Kit - 71.00mm Bore
Enhance your engine's performance and durability with this Wossner forged piston kit. Precision-engineered in Germany, this piston is designed for optimal strength and heat transfer, ensuring efficient combustion and longevity.
The advanced elliptical design distributes thrust loads evenly, preventing localized pressure and piston collapse even under extreme operating temperatures. This results in a more uniform bearing surface and improved overall engine reliability.
Key Features:
- Forged Construction: Offers superior strength and resilience compared to cast pistons.
- Optimized Heat Transfer: Promotes efficient combustion and helps maintain optimal cylinder wall temperatures.
- Elliptical Design: Ensures uniform load distribution and prevents piston collapse under heat expansion.
- High-Quality Manufacturing: Proudly made in Germany for exceptional craftsmanship and reliability.
Specifications:
- Bore: 71.00mm
- Diameter: 70.94mm
- Displacement (cm³): 246
- Stroke (mm): 64.00
- Clearance (mm): 0.06
- Compression Ratio: 2-Stroke
- Compression Height (mm): 33.00
This kit includes necessary components for a complete installation. Please refer to the included part numbers for specific accessories.
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.