Cylinder Works Big Bore Gasket Kit for 2009-2016 Kawasaki KX250F 31004-G01

When you're pushing your KX250F to its limits, factory tolerances become your biggest constraint. The Cylinder Works Big Bore Gasket Kit delivers measurable displacement gains and improved combustion efficiency without requiring engine teardown or machine work. Bolt it on, and you'll feel the difference in throttle response and mid-range power immediately.

This kit pairs a CNC-ported big bore cylinder with a matched Vertex piston designed to reduce carbon buildup and mechanical noise—critical for maintaining reliability during intense riding conditions. The Nickel Silicon Carbide plating resists wear far longer than standard cast iron, meaning your investment stays consistent lap after lap. Since everything comes pre-matched and ready to install, you spend your time riding, not troubleshooting fitment issues.

• Direct bolt-on installation
• Matched Vertex piston included
• Nickel Silicon Carbide plated
• Includes gaskets, rings, pin, clips
• No machine work required
• U.S.A. manufactured
• Fits 2009-2016 KX250F
• MPN: 31004-G01