Wossner forged pistons are engineered for superior strength and thermal performance, with an elliptical design that promotes even load distribution during heat expansion, preventing piston collapse. This high-compression model for Yamaha YZ450F features a 97.00mm bore (96.96mm actual size) and is made in Germany.

Features

• Forged for strength and durability


• Elliptical design for uniform expansion and load distribution


• Optimized for high thermal conductivity


• Made in Germany

Specifications

• Bore Size: 97.00mm (actual 96.96mm)


• Displacement: 449 cm³


• Stroke: 60.80mm


• Clearance: 0.04mm


• Wossner Compression Ratio: 13.50:1


• OEM Compression Ratio: 12.50:1


• Dome Volume: -2.10 cm³


• Compression Height: 24.00mm

Cross-Reference OEM Part Numbers

• 1SL-11631-00-00

Vehicle Fitments

• Yamaha YZ450F 2014–2015