Wossner forged pistons offer exceptional strength and advanced design, optimized for efficient heat transfer from the combustion chamber to the cylinder walls. Featuring an elliptical profile, the piston ensures even load distribution under thermal expansion, reducing localized pressure and minimizing the risk of piston collapse. This specific model has a 97.01mm bore (96.97mm actual size) and is manufactured in Germany for Yamaha YZ450F engines.

Features

• Forged construction for superior strength


• Optimized for efficient thermal conductivity


• Elliptical design for uniform expansion and thrust distribution


• Made in Germany

Specifications

• Bore Size: 97.01mm (actual 96.97mm)


• Displacement: 449 cm³


• Stroke: 60.80mm


• Clearance: 0.04mm


• Compression Ratio: OEM (12.50:1)


• Dome Volume: -4.90 cm³


• Compression Height: 24.00mm

Cross-Reference OEM Part Numbers

• 1SL-11631-00-00

Vehicle Fitments

• Yamaha YZF 450 2014–2015