CYLINDER FULL KIT +5.60mm BIG BORE 72.00mm NEW VERSION YAMAHA 2003 - 2025 YZ 2T 250 ATHENA P400485100104

Complete big bore cylinder kit designed for Yamaha YZ 250 two-stroke models, featuring a newly engineered cylinder, piston, head, and associated components. This updated version incorporates revised internal geometries and improved component design to deliver increased engine output, consistent combustion behaviour, and dependable operation across varying engine speeds.

Features

• Complete cylinder kit including cylinder, piston, head, and gasket set

• Redesigned cylinder with revised port timing for improved gas flow

• Direct replacement kit for standard engine configuration

Specifications

• Bore size: 72.00 mm

• Bore increase: +5.60 mm

• Application: 2-stroke engine

• Manufacturer part number: P400485100104

Vehicle Fitments

• Yamaha YZ 250 (2003–2026)