ProX Piston Kit for Kawasaki KX250F, 76.97 mm (01.4342.B)

Upgrade the top-end performance and reliability of your Kawasaki KX250F with the PROX 01.4342.B Piston Kit. Designed as a direct-fit replacement solution, this kit includes the essential components needed for a professional piston installation, helping restore compression, throttle response, and dependable engine operation. The 76.97 mm piston is engineered for compatibility with applicable Kawasaki KX250F applications and is manufactured to precise standards for consistent fit and performance.
The PROX piston is precision machined on state-of-the-art CNC equipment to maintain accurate dimensions and a dependable surface finish. Its low-expansion, low-friction alloy is designed to support smooth piston movement, reduce operating friction, and promote stable performance across changing engine temperatures. This construction makes the kit well suited for riders, engine builders, and technicians seeking a quality replacement piston for motocross and off-road use.
Each PROX 01.4342.B kit includes a piston, piston rings, wrist pin, and circlips, providing the primary components required for installation. Replacing these wear items together can help ensure proper sealing and balanced operation when rebuilding the top end. Verify the motorcycle model, engine specifications, and required piston clearance before installation, and follow the manufacturer’s service procedures for assembly and break-in.
Feature: Complete piston kit includes piston, rings, wrist pin, and circlips. Feature: Precision machined using advanced CNC equipment. Feature: Low-expansion, low-friction alloy supports smooth and consistent operation. Feature: 76.97 mm piston size for compatible Kawasaki KX250F applications. Feature: PROX part number 01.4342.B for accurate product identification.

Features:

• Complete kit includes piston, rings, wrist pin, and circlips

• Precision machined on state-of-the-art CNC equipment

• Made from a low-expansion, low-friction alloy

• 76.97 mm piston size for compatible Kawasaki KX250F applications

• PROX part number 01.4342.B

Ships from Parts Unlimited.