Cylinder Works big bore cylinder kit for Yamaha 250 models, designed as a replacement top-end assembly for 4-cycle engines with increased displacement to 270 cc. This kit includes the cylinder, piston kit, and top-end gasket kit, and is specified with an 80 mm cylinder diameter, 13.8:1 compression ratio, 3.00 mm oversize, and compatibility with Vertex piston reference 24405.

Features

• Big bore cylinder kit

• Replacement top-end assembly

• Includes cylinder, piston kit, and top-end gasket kit

• Uses Vertex #24405

Specifications

• Cylinder diameter: 80 mm

• Compression ratio: 13.8:1

• Displacement: 270 cc

• Engine type: 4-cycle

• Cylinder kit type: big bore

• Size over standard: 3.00 mm

Vehicle Fitments

• Yamaha WR 250 F (2020-2024)

• Yamaha YZ 250 F (2019-2024)

• Yamaha YZ 250 FX (2020-2024)