Athena 304CC Kit YZ250F & YZ250FX 2024-2026 85mm bore

Athena 304CC Kit YZ250F/FX 2024-2026 85mm bore

Increase your Yamaha YZ250F to 300cc for significant torque gains. Complete big bore kit for 2024-2026 delivers more power across the entire power range with fantastic engineering from Athena for excellent reliability.

• Key Features

• • 304cc Displacement: Substantial increase over stock
  • Complete Kit: Cylinder, piston, gaskets included
  • Nikasil Coating: Factory-quality bore treatment
  • Quality Construction: Designed for reliability

• Performance Benefits

• • Significantly more torque
  • Stronger low-to-mid acceleration
  • Easier power delivery
  • Improved drive
  • Now Included with GET Boost Module
• It's highly recommended to use a stand alone ECU properly tuned for the overbore.  We have SX1 ECU Units available with custom mapping we  developed with Cody Webb that make this kit a true performance powerhouse!

Athena P/N P400485100112