PISTON KIT 1997 YZ125 54.00, WOSSNER 8117DB YAMAHA MX

This Wossner forged piston kit is developed for the 1997 Yamaha YZ125, featuring a +0.01mm oversize with a 54.01mm bore. German-manufactured and built for high-performance two-stroke engines, this piston is engineered with an elliptical design to manage heat expansion evenly. It minimises localised pressure, distributes thrust loads uniformly, and supports efficient heat transfer to the cylinder walls, reducing the risk of mechanical failure and improving engine reliability.

Features

• Forged piston construction for high strength and durability

• Elliptical shape distributes pressure evenly under heat expansion

• Prevents piston collapse and enhances structural stability

• Supports efficient combustion heat dissipation

• Precision-crafted in Germany

Specifications

• Bore Size: 54.01mm (+0.01mm oversize)

• Actual Diameter: 53.95mm

• 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: 8117DB

• Lock: CW15

• Pin: WP032

• Ring Set: RSB5400

• Rod: P2019

Vehicle Fitments

• 1997 Yamaha YZ125