PISTON KIT 10-22 RMZ250 77mm B, WOSSNER SUZUKI 8781DB
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with
Wossner 77.01mm B piston kit. This Wossner forged piston is superior in strength and design, engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. It is elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse. Made in Germany. Part number 8781DB. Includes lock P/N CW16, pin P/N WP070, and ring set P/N 770XAS-S. Display (cm3) 249. Hub stroke (mm) 53.80. Clearance (mm) 0.04. Wossner compression Ratio: 13.60:1. OEM Compression ratio: 13.50:1. Dome volume (cm3) -2.60. Compression height (mm) 19.60. Theoretical weight (G) 224.
- SKU
- 56-W951.B.WO
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (16)
| Make | Model | Year |
|---|---|---|
| SUZUKI | RM-Z 250 | 2010 |
| SUZUKI | RM-Z 250 | 2011 |
| SUZUKI | RM-Z 250 | 2012 |
| SUZUKI | RM-Z 250 | 2013 |
| SUZUKI | RM-Z 250 | 2014 |
| SUZUKI | RM-Z 250 | 2015 |
| SUZUKI | RM-Z 250 | 2016 |
| SUZUKI | RM-Z 250 | 2017 |
| SUZUKI | RM-Z 250 | 2018 |
| SUZUKI | RM-Z 250 | 2019 |
| SUZUKI | RM-Z 250 | 2020 |
| SUZUKI | RM-Z 250 | 2021 |
| SUZUKI | RM-Z 250 | 2022 |
| SUZUKI | RM-Z 250 | 2023 |
| SUZUKI | RM-Z 250 | 2024 |
| SUZUKI | RM-Z 250 | 2025 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 77.00mm
- Variant Id
- 258347
FULL DESCRIPTION
Wossner Piston Kit for Suzuki RM-Z250
This Wossner piston kit is designed for high-performance engines, offering superior strength and advanced design. Engineered in Germany, these pistons are built to optimize combustion chamber heat transfer to the cylinder walls. The elliptical design ensures a more uniform bearing surface, even under extreme heat expansion, which helps prevent localized pressure and distributes thrust loads evenly, thus avoiding piston collapse.
Key Features:
- Forged pistons for exceptional strength and durability.
- Engineered for optimal heat transfer to cylinder walls.
- Elliptical design to manage heat expansion and distribute thrust loads evenly.
- Precision manufacturing ensures a uniform bearing surface.
- Made in Germany to exacting standards.
Specifications:
- Bore Size: 77.01mm
- Piston Type: B
- Part Number: 8781DB (+0.01MM)
- Lock Pin Part Number: CW16
- Pin Part Number: WP070
- Ring Set Part Number: 770XAS-S
- Engine Displacement (cm³): 249
- Stroke (mm): 53.80
- Clearance (mm): 0.04
- Wossner Compression Ratio: 13.60:1
- OEM Compression Ratio: 13.50:1
- Dome Volume (cm³): -2.60
- Compression Height (mm): 19.60
- Theoretical Weight (G): 224
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Check the fitment table on this page against your make, model and year. Not sure? Call or email us 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.


