
The Story
Wossner high-compression forged pistons are engineered for strength and optimal thermal conductivity, promoting efficient heat transfer and even load distribution under expansion. This piston features a 97.00mm bore (96.95mm actual size) and is designed for Yamaha YZ450F models with a 13.6:1 compression ratio.
Features
- Forged construction for strength and durability
- Elliptical design for even expansion and load distribution
- High-compression specification
- Made in Germany
Specifications
- Bore Size: 97.00mm (actual 96.95mm)
- Compression Ratio: 13.6:1
Cross-Reference OEM Part Numbers
- BR9-11631-00-00
Vehicle Fitments
- Yamaha YZ450F 2018–2019
Description
Wossner high-compression forged pistons are engineered for strength and optimal thermal conductivity, promoting efficient heat transfer and even load distribution under expansion. This piston features a 97.00mm bore (96.95mm actual size) and is designed for Yamaha YZ450F models with a 13.6:1 compression ratio.
Features
- Forged construction for strength and durability
- Elliptical design for even expansion and load distribution
- High-compression specification
- Made in Germany
Specifications
- Bore Size: 97.00mm (actual 96.95mm)
- Compression Ratio: 13.6:1
Cross-Reference OEM Part Numbers
- BR9-11631-00-00
Vehicle Fitments
- Yamaha YZ450F 2018–2019




















