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

WISECO 4-stroke forged piston kit for Yamaha YZ 250 F

The WISECO forged piston kit is designed for the 4-stroke engine of the Yamaha YZ 250 F (CG 39) in the 2017-2018 model year range. The piston is made of aluminum and is forged. The kit thus offers a precisely defined solution for use in the upper engine area and supports a precise selection based on the specified piston dimensions.

Technical features

• Piston type: forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø (mm): 76.96
• Letter oversize: B
• Oversize: +0.01
• Compression ratio: 13.5:1
• Rings Quantity: Set
• Stroke: 4T

The compression ratio of 13.5:1 and the standard piston compression are key technical parameters for the assignment of the piston. The diameter of 76.96 mm, the marking B and the oversize specification +0.01 make it easier to compare the required engine dimensions.

Vehicle assignment

The forged piston kit fits the Yamaha YZ 250 F (CG 39), built in 2017-2018. When making the selection, this assignment should be compared with the technical specifications of the existing engine.

Selection note

When ordering, the diameter Ø (mm) of 76.96, the oversize letter B, the oversize specification +0.01 and the compression ratio 13.5:1 are particularly important. The version is intended as a 4-stroke piston for the Yamaha YZ 250 F mentioned.