PISTON KIT 07-09 RMZ250 77.00, WOSSNER 8666DB SUZUKI
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
Wossner 8666DB forged piston kit with a 77.01mm bore is designed for Suzuki RM-Z250 models from 2007 to 2009. Made in Germany, this high-performance piston ensures efficient heat dissipation and strength. Its elliptical design provides a uniform bearing surface during thermal expansion, reducing stress concentrations and preventing piston failure. Features include forged piston for enhanced strength and longevity, optimized for efficient heat transfer to cylinder walls, elliptical shape distributes load evenly under thermal expansion, reduces localized pressure and risk of piston collapse, and manufactured in Germany. Specifications include a bore of 77.01 mm, actual bore diameter of 76.97 mm, display of 249 cm³, hub stroke of 53.60 mm, clearance of 0.04 mm, compression height of 19.60 mm, dome volume of -3.30 cm³, Wossner compression ratio of OEM, and OEM compression ratio of 13.40:1. Cross-reference OEM part numbers include Piston: 8666DB, Lock: CW16, Pin: WP059, Ring Set: 770XAS, Rod: P4004, Main Bearing: 2 x MB830046, and Part No.: 56-W4921.B.WO.
- SKU
- 56-W4921.B.WO
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (3)
| Make | Model | Year |
|---|---|---|
| SUZUKI | RM-Z 250 | 2007 |
| SUZUKI | RM-Z 250 | 2008 |
| SUZUKI | RM-Z 250 | 2009 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 77mm
- Variant Id
- 256383
FULL DESCRIPTION
Wossner 8666DB Forged Piston Kit for Suzuki RM-Z250
Elevate your motorcycle's performance with the Wossner 8666DB forged piston kit. This high-quality piston is engineered for demanding conditions, offering superior strength and durability for your Suzuki RM-Z250.
Key Features:
- Forged Construction: Provides exceptional strength and resilience for increased longevity.
- Optimized Heat Dissipation: Designed for efficient heat transfer to the cylinder walls, promoting consistent engine operation.
- Elliptical Piston Design: Ensures a uniform bearing surface during thermal expansion, reducing stress concentrations.
- Reduced Stress: This advanced design minimizes localized pressure, significantly lowering the risk of piston failure or collapse.
- German Engineering: Manufactured to precise standards in Germany, guaranteeing exceptional quality.
Specifications:
- Bore: 77.01 mm
- Actual Bore Diameter: 76.97 mm
- Displacement: 249 cm³
- Stroke: 53.60 mm
- Clearance: 0.04 mm
- Compression Height: 19.60 mm
- Dome Volume: -3.30 cm³
- Wossner Compression Ratio: OEM
- OEM Compression Ratio: 13.40:1
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
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.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. 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.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


