Yamaha YZ 250 F (CG 39) [2017-2018] - 4-stroke forged piston kit - ø77.00mm

WISECO 4-stroke forged piston kit with 77.00 mm design

The WISECO 4-stroke forged piston kit is intended for the Yamaha YZ 250 F (CG 39) built in 2017-2018. It belongs to the engine area, more precisely to the upper engine area, and is designed as a piston kit for the appropriate application.

Piston and design

The piston is made of aluminum and is forged. The product name shows a diameter of ø77.00mm; The technical diameter specified is 76.97 mm. The version bears the letter C and is oversized by +0.02.

• Material: aluminum
• Piston Type: Forged
• Diameter Ø: 76.97 mm
• Letter oversize: C
• Oversize: +0.02
• Piston compression: standard
• Compression ratio: 13.5:1
• Rings Quantity: Set
• Stroke: 4T

Vehicle assignment

The forged piston kit fits the Yamaha YZ 250 F (CG 39), year 2017-2018. The model name and complete year of manufacture are decisive for the selection.

Selection guide

The combination of forged aluminum design, standard piston compression, 13.5:1 compression ratio and the C marking supports a targeted selection within the specified vehicle classification. The specified diameter and oversize should be compared with the technical requirements of the motor before ordering.