WOSSNER 77mm HC PISTON KIT A, YAMAHA WR250F 18-19, YZ250F 16-18, YZ250FX 17-19

Wossner high-compression forged pistons are built for durability and thermal efficiency, designed to facilitate effective heat transfer and uniform expansion under pressure. The elliptical structure reduces localized stress, preventing piston collapse. This high-compression piston kit features a 77.00mm bore (76.95mm actual size) and a 14.4:1 compression ratio, made for Yamaha YZ 250 F models from 2016 to 2018.

Features

• Forged for enhanced strength
• Elliptical design for uniform thermal expansion
• High-compression specification
• Made in Germany

Specifications

• Bore Size: 77.00mm (actual 76.95mm)
• Compression Ratio: 14.4:1

Cross-Reference OEM Part Numbers

• 1SM-11631-10-00

Vehicle Fitments

• Yamaha YZ 250 F 2016–2018

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.