Yamaha YZ 250 F (CG 39) [2017-2018] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for Yamaha YZ 250 F

The WÖSSNER Pro Series forged piston is designed for the Yamaha YZ 250 F (CG 39) built in 2017-2018. The vehicle assignment and the specified dimension data support a targeted selection of the engine for this model variant.

Execution and function

The piston is made of aluminum and is forged. As a specific design feature, it has a forged double bridge. The version with 2 piston rings and a compression ratio of 13.7:1 describes the key technical data of this piston.

Technical data

• Material: aluminum
• Piston Type: Forged
• Specificity: Forged double bridge
• Diameter Ø: 76.95 mm
• Bore diameter: 77.00 mm
• Compression ratio: 13.7:1
• Number of piston rings: 2
• Letter oversize: A
• Oversize: STD

Vehicle assignment

Suitable for the Yamaha YZ 250 F (CG 39), built between 2017 and 2018. The specified piston diameter of 76.95 mm, the bore diameter of 77.00 mm and the markings A and STD are particularly important for the selection.

Factual advice on selection

Before ordering, please compare the model name, the complete year of manufacture and the technical dimensions with the existing engine. The fixed vehicle reference for this product is Yamaha YZ 250 F (CG 39) from the years 2017-2018.