PISTON KIT 77-78 YZ400 86.00, WOSSNER 8264D100 YAMAHA MX, 77-78 IT400
Wossner piston kit with an 86mm bore size (85.92mm actual). Forged in Germany for optimal strength and heat management. Features an elliptical profile that distributes thrust loads uniformly during thermal expansion, reducing localised pressure and minimising the risk of piston collapse. Forged construction for enhanced structural integrity. Elliptical design ensures uniform load distribution under heat expansion. Promotes efficient heat transfer from the combustion chamber to the cylinder walls. Manufactured in Germany. Specifications: Bore Size 86mm (85.92mm), Display 398 cm³, Stroke 82.00 mm, Clearance 0.08 mm, Compression Height 40.00 mm, Compression Ratio 2-stroke (Wossner and OEM). Cross-Reference OEM Part Numbers: Piston Kit 8264D100, Lock CW18, Pin WP042, Ring Set RSC8600 x2, Part No. 56-W550_1.00.WO. Weight 510g.
- SKU
- 56-W550_1.00.WO
- Brand
- Wossner
- Availability
- In Stock (1)
FULL DESCRIPTION
Wossner 86mm Piston Kit for Yamaha YZ400 & IT425
This high-performance Wossner piston kit is engineered for optimal strength, durability, and heat management in your Yamaha YZ400 and IT425 motorcycles. Manufactured in Germany, this piston features a forged construction for superior structural integrity and an advanced elliptical profile. This innovative design ensures uniform load distribution as the piston expands and contracts with heat, significantly reducing localized pressure points and mitigating the risk of piston collapse for enhanced longevity. The piston promotes efficient heat transfer from the combustion chamber to the cylinder walls, contributing to optimal engine performance.
Key Features:
- Forged construction for enhanced structural integrity and durability.
- Elliptical piston profile ensures uniform load distribution under thermal expansion.
- Reduces localized pressure points and minimizes the risk of piston collapse.
- Promotes efficient heat transfer from the combustion chamber.
- Manufactured to exacting standards in Germany.
Specifications:
- Bore Size: 86mm (85.92mm actual)
- Displacement: 398 cm³
- Stroke: 82.00 mm
- Clearance: 0.08 mm
- Compression Height: 40.00 mm
- Compression Ratio: 2-stroke (compatible with Wossner and OEM specifications)
Component Details:
- Piston Kit: 8264D100
- Lock Ring: CW18
- Pin: WP042
- Ring Set: RSC8600 x2
