Discover how to upgrade your Kawasaki KX 250 with Athena's Extreme Big Bore Kit, which increases displacement to 300 cc, delivering a significant boost in power and torque across the entire power band. This kit is the ideal solution for riders who want to push their bike's performance beyond standard limits while maintaining the legendary handling and lightness of this motocross machine.

Enhance Your Kawasaki KX 250 Performance
The kit includes an aluminum alloy cylinder with an 85 mm steel bore, a high-quality forged piston complete with pin and rings, and all necessary gaskets. This cylinder kit results from years of off-road and racing research and development, ensuring smooth and continuous power delivery suitable for all RPM ranges.

Electronic Innovation with GET Boost
Included in the kit is the GET Boost electronic module, developed by Athena’s GET division, which takes your Kawasaki KX 250’s performance to the next level. GET is globally recognized for its collaborations with top off-road teams, including MXGP and AMA Supercross. With GET Boost, you can fully leverage the Big Bore kit’s performance without needing to modify the original ECU or electrical system.

Features:

• 85 mm bore diameter for maximum displacement increase
• No crankcase machining required for installation
• Racing forged piston with fully open boxed bridged design and anti-friction coating
• Aluminium alloy cylinder with steel cylinder liner for enhanced durability

Specifications:

• Bore Diameter: 85 mm
• Displacement: 296cc
• Cylinder Material: Aluminium alloy with steel liner
• Piston Type: Forged aluminium with molybdenum disulfide coating

Vehicle Compatibility:

• Kawasaki KX 250  2023-2024
• Kawasaki KX 250X  2023-2024

Notes:

• The cylinder head and base gaskets included are specifically developed for this kit. When disassembling the cylinder kit, replace the gaskets with the specific Athena spare gasket kit; do not use OEM replacement gaskets.
• Intended for race use only; not suitable for street use.