PISTON KIT 88-07 YFS200 66.50, WOSSNER 8101D050 YAMAHA ATV

The Wossner 8101D050 piston kit is engineered for Yamaha YFS200 Blaster models from 1988 to 2006, featuring a 66.50 mm bore for +0.50 mm oversize applications. Produced in Germany from high-strength forged materials, this piston ensures durability and efficient heat transfer. Its elliptical design promotes even load distribution under heat expansion, minimising localised stress and reducing the risk of piston collapse. The kit includes all necessary components for a reliable and precise engine rebuild.

Features

• Forged piston offers enhanced strength and heat resistance

• Designed for efficient combustion chamber heat dissipation

• Elliptical profile distributes thrust loads evenly during thermal expansion

• Reduces localised pressure and risk of piston deformation

• Manufactured in Germany with high precision

Specifications

• Bore Size: 66.50 mm

• Actual Bore Diameter: 66.44 mm

• Stroke: 57.00 mm

• Display Displacement: 199 cm³

• Clearance: 0.06 mm

• Compression Ratio (Wossner and OEM): 2-stroke

• Compression Height: 29.90 mm

Cross-Reference Wossner Part Numbers

• Piston Kit: 8101D050

• Lock: CW16

• Pin: WP027

• Ring Set: RSB6650 (Quantity: 2)

• Rod: P2030

• Part No.: 56-W573+050.WO

Vehicle Fitments

• Yamaha YFS200 Blaster (1988–2006)