Wossner Piston WO-8003-D_ – Yamaha 125cc

Wossner Piston WO-8003-D150 – Yamaha 125cc

The Wossner WO-8003-D150 Piston is a forged replacement piston designed for a range of classic Yamaha 125cc two-stroke motorcycles and ATV models. Part of Wossner's Standard Series, it features a dual-ring design with intake window for excellent sealing, durability and reliable engine performance. This piston is supplied in a +1.50 mm oversize configuration for cylinders that have been professionally rebored.

Vehicle Applications

• Yamaha AT-2 125: 1972–1976
• Yamaha AT-3 125: 1972–1976
• Yamaha DT 125: 1975–1976
• Yamaha DT 125 E: 1975–1992
• Yamaha DT 125 F: 1975–1992
• Yamaha DT 125 LC: 1975–1992
• Yamaha DT 125 LC: 1980–1991
• Yamaha DT 125 MX: 1975–1992
• Yamaha DT 125 Tenere: All Years
• Yamaha IT 125: 1980–1981
• Yamaha RD 125 LC: 1982–1992
• Yamaha YT 125 Tri-Moto: 1980–1985

Specifications

• Part Number: WO-8003-D150
• Bore Size: 57.50 mm
• Piston Diameter: 57.44 mm
• Oversize: +1.50 mm
• Piston Clearance: 0.06 mm
• Ring Configuration: Dual Ring
• Piston Ring: RSB5750
• Ring Quantity: 2
• Wrist Pin: WP036
• Wrist Pin Diameter: 16 mm
• Circlips: CW16
• Compression Height: 29.90 mm
• Overall Length: 50.70 mm
• Connecting Rod: P2050
• Small-End Bearing: N1016

Features

• Wossner Standard Series forged piston
• Dual-ring configuration
• Intake window piston design
• +1.50 mm oversize
• Precision manufactured for reliable two-stroke performance

Important: Oversize pistons require the cylinder to be accurately measured and professionally machined to suit. Always confirm piston size and engine application before installation.

Disclaimer: Product images are for illustration purposes only and may differ from the actual product supplied. Vehicle applications and specifications are provided as a guide only. It is the purchaser's responsibility to confirm the part number, dimensions and fitment are correct before installation.