PISTON KIT/4 KAW KZ10R C 13:1, WOSSNER K8746D200-4 O/S 2.00
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with
Wossner 78mm bore piston kit. This kit includes piston rings and gudgeon pins. The piston is forged and made in Germany. Engineered to provide superior strength and design, it facilitates optimal combustion chamber heat transfer to cylinder walls. The elliptical design ensures a uniform bearing surface under piston heat expansion, eliminating localized pressure and evenly distributing thrust loads to prevent piston collapse. This kit is an overbore of 2.00mm, resulting in a 13:1 compression ratio. Display volume is 998 / 1051 cm3. Hub stroke is 55.00mm. Clearance is 0.06mm. Wossner compression ratio is 13.40:1. OEM compression ratio is 12.70:1. Dome volume is -1.80 cm3. Compression height is 22.70mm. Piston part number K8746D200-4. Lock P/N CW17. Pin P/N WP038. Ring Set P/N 780XWY.
- SKU
- 56-W9808.78.WO
- Brand
- Wossner
- Availability
- In Stock (1)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- Variant Id
- 258790
FULL DESCRIPTION
Wossner Forged Piston Kit +2.00mm Oversize
This Wossner piston kit is designed for high-performance applications, featuring a 78mm bore and a +2.00mm oversize. Wossner forged pistons are engineered for superior strength and optimal combustion chamber heat transfer to cylinder walls, preventing hot spots on piston crowns. The elliptical design ensures uniform bearing surface under piston heat expansion, distributing thrust loads evenly and preventing piston collapse.
This kit includes all necessary piston rings and gudgeon pins.
- Superior strength and design
- Engineered for efficient heat transfer
- Elliptically designed for even load distribution
- Prevents localized pressure and piston collapse
- Made in Germany
Key Specifications:
- Piston Bore: 78mm
- Oversize: +2.00mm
- Wossner Compression Ratio: 13.40:1
- OEM Compression Ratio: 12.70:1
- Dome Volume: -1.80 cm3
- Compression Height: 22.70mm
- Piston Pin Part Number: WP038
- Ring Set Part Number: 780XWY
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.


