Skip to product information
CYLINDER FULL KIT +5.60mm BIG BORE 72.00mm YAMAHA 2003 - 2025 YZ 2T 250 ATHENA P400485100042
£1,256.31 GBP
Taxes included.
Athena Big Bore Cylinder Kit for Yamaha YZ 250 2T, increasing displacement to 293cc with a bore diameter of 72.00mm (+5.60mm over stock). Engineered in Italy, this kit includes a high-quality aluminum cylinder with a nickel-silicon coating for durability and wear resistance. Designed for direct installation without modifications to the engine crankcase.
Features
- Increases displacement to 293cc
- Bore diameter: 72.00mm (+5.60mm over stock)
- Compression ratio: 15.0:1
- Nickel-silicon coated for wear resistance
- Includes all necessary components for installation
- No modifications required to the engine crankcase
Specifications
- Bore Diameter: 72.00mm
- Bore Gain: +5.6mm
- Compression Ratio: 15.0:1
- Displacement: 293cc
- Net Weight: 3.50 kg
Included Components
- Aluminum cylinder
- Cylinder head
- Complete piston (with piston pin and rings)
- Exhaust valve kit
- Gasket kit
Cross-Reference OEM Part Numbers
- S4F07200006A (Piston Kit 71.95mm)
- S4F07200006B (Piston Kit 71.96mm)
- P400485160183 (Gasket Kit)
- S410485308029 (Cylinder Head)
- S410485303025 (Valve Assy Kit)
- S41316257 (Rings)
Vehicle Fitments
- Yamaha YZ 250 2T (2003-2025)