PISTON KIT 1983&85 YZ125 56.75, WOSSNER 8119D075 YAMAHA
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Wossner piston kit with 56.75mm bore (+0.75 oversize) and 56.69mm measured bore. Forged construction for enhanced strength and improved thermal transfer. Piston's elliptical shape distributes thrust loads evenly, reducing the risk of piston collapse. Manufactured in Germany. Bore Size: 56.75mm. Bore (Actual Measured): 56.69mm. Display Volume: 83 cm³. Stroke: 84.00mm. Clearance: 0.06mm. Compression Ratio (Wossner): 2-stroke. Compression Ratio (OEM): 2-stroke. Compression Height: 30.80mm. Dome Volume: Not specified. Theoretical Weight: Not specified. Lock Part Number: CW16. Pin Part Number: WP036. Ring Set Part Number: RSB5600. Cross-Reference OEM Part Numbers: 39W-11-630-00-00, 55Y-11631-00-94.
- SKU
- 56-W503+075.WO
- Brand
- Wossner
- Availability
- In Stock (1)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 56.75mm
- Variant Id
- 256560
FULL DESCRIPTION
Wossner Piston Kit 56.75mm Bore for Yamaha YZ125
Upgrade your Yamaha YZ125 with this high-performance Wossner piston kit. Engineered for durability and optimal performance, this kit features a forged construction and an advanced elliptical design.
Key Features:
- Forged Construction: Provides superior strength and longevity.
- Enhanced Thermal Transfer: Effectively moves heat from the combustion chamber to the cylinder walls, aiding in efficient engine operation.
- Elliptical Piston Design: Ensures uniform pressure distribution, significantly reducing thrust loads and minimizing the risk of piston collapse.
- German Engineering: Manufactured to exacting standards in Germany.
Specifications:
- Bore Size: 56.75mm
- Actual Measured Bore: 56.69mm
- Stroke: 84.00mm
- Piston Clearance: 0.06mm
- Compression Height: 30.80mm
- Lock Pin Part Number: CW16
- Pin Part Number: WP036
- Ring Set Part Number: RSB5600
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.