Namura .040 Over Bore Piston Kit for Kawasaki 2003-2011 Bayou 250 2x4 - 70mm

Namura .040 Over Bore Piston Kit for Kawasaki

This Namura .040 over bore piston kit for Kawasaki Bayou 250 2x4 engines is a direct replacement piston assembly designed to restore compression and power in worn-out cylinders.

Overview

This Namura .040 over bore piston kit provides the necessary over bore to refresh cylinders that cannot be reconditioned with standard pistons. It is suitable for 2003-2011 models using a 70mm bore size. This piston kit is ideal for off-road and utility riding.

Built For Performance

• Precision-machined from high-strength aluminum alloy for durability
• .040 over bore (1.0mm) increases displacement slightly for added torque
• Includes piston, rings, wrist pin, and circlips for a complete assembly
• Engineered to factory specifications for reliable fit and performance
• Replaces worn factory pistons without cylinder resleeving

Fits These Machines

• for Kawasaki Bayou 250 2x4 (2003-2011)

On-The-Job Use

• Rebuilding engines on Kawasaki Bayou 250 ATVs used for trail riding and work
• Overcoming blow-by and low compression in high-mileage engines
• Restoring performance in utility ATVs used for hauling and plowing
• Suitable for both recreational and light commercial use

Specs At A Glance

Good To Know

Q: Will this piston kit work with a standard cylinder? A: This .040 over bore piston kit requires the cylinder to be bored to the corresponding size. It will not fit a stock bore cylinder without machining.

Q: Is the piston coated or skirted? A: The piston is uncoated; we recommend proper break-in procedures per the manufacturer's guidelines for optimal ring seating.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.