PISTON KIT 1997 YZ125 56.00, WOSSNER 8117D200 YAMAHA MX

This Wossner forged piston kit is developed for the 1997 Yamaha YZ125 and features a 56.00mm bore (+2.00mm oversize). Precision-engineered in Germany, it is designed with an elliptical profile that optimises load distribution and reduces localised stress during heat expansion. This construction enhances durability and prevents piston collapse under high-performance conditions. The kit promotes effective heat dissipation from the combustion chamber to the cylinder wall, ensuring stable engine performance in demanding two-stroke applications.

Features

• High-strength forged piston for durability and performance

• Elliptical profile allows uniform expansion under heat

• Minimises risk of piston collapse by reducing localised stress

• Optimised for effective combustion heat transfer

• Precision-manufactured in Germany

Specifications

• Bore Size: 56.00mm (+2.00mm oversize)

• Actual Diameter: 55.94mm

• Compression Height: 28.00mm

• Stroke: 54.50mm

• Displacement: 124 cm³

• Piston Clearance: 0.06mm

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

Cross-Reference OEM Part Numbers

• Wossner Piston Kit Part No: 8117D200

• Lock: CW15

• Pin: WP032

• Ring Set: RSB5600

• Rod: P2019

Vehicle Fitments

• 1997 Yamaha YZ125