ProX 01.4340.A Piston Kit KX250F 2010 Standard Bore 76.96mm 13.2:1

The ProX 01.4340.A Piston Kit is a forged, precision-engineered replacement piston kit designed for the 2010 Kawasaki KX250F. Featuring a standard bore diameter of 76.96mm and a high-compression ratio of 13.2:1, this kit delivers factory-quality fitment and reliable performance for motocross and off-road riding.

Key Features:

• Standard bore diameter: 76.96mm (A-size) for precise cylinder fitment
• Compression ratio: 13.2:1 for strong, consistent power delivery
• Forged construction using low-expansion, low-friction aluminum alloy for superior strength and reduced weight
• Precision machined on state-of-the-art CNC equipment to tight tolerances
• Manufactured to OEM quality standards — the same alloy used by major Japanese engine manufacturers
• Oversized piston options available to maintain proper manufacturer-specified piston-to-cylinder wall clearances

What's Included:

• Forged piston
• Piston ring set
• Wrist pin
• Circlips

This complete kit provides everything needed for a top-end rebuild. Cross-reference numbers for this application include OEM 13001-0115, Wiseco 40009M, and Vertex 23566. Always inspect and measure your cylinder before ordering to ensure proper bore sizing.