Namura NA-40013-B Piston Kit

Why replace your cylinder when you can replace the piston for a fraction of the cost and time? Namura offers direct replacements for the original equipment as well as hi-compression and a variety of oversizes to meet your ride’s needs. They are available in 0.25mm increments, from the -1 (0.25mm) through the -8 (2mm) oversize. We also carry B (0.01mm) and C (0.02mm) oversizes which help extend the life of your expensive coated cylinders; a selection of big bore piston kits is available for some applications. Combine this with the MOS2 coating and hard anodizing, Namura gives you a higher performance piston without the higher price.

Namura piston kits come with the piston individually wrapped; a set of OEM quality rings packed in their own box, a wrist pin, and circlips.

MOS2 (Teflon/Molybdenum) Coated Skirts
A rolled-on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction, and helping to eliminate cold seizures.

Machined Smooth Heads
Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%.

Anodized Domes
Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons.

Hypereutectic Casting Process
Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures.

The Namura NA-40013-B Piston Kit is a replacement engine component designed to support dependable piston service and repair. This kit provides a practical solution for restoring piston function during an engine rebuild or top-end maintenance, helping ensure the replacement component is properly matched to the specified application. Manufactured under the Namura brand, it is suited for repair professionals, powersports technicians, and equipment owners seeking a purpose-specific piston kit.

Using the correct piston kit is important for maintaining proper engine operation, combustion performance, and overall reliability. The Namura NA-40013-B is identified by its dedicated part number, making it easier to select the correct replacement for compatible engine applications. Before installation, confirm application compatibility and inspect related components, including the cylinder, rings, wrist pin, retaining clips, and connecting rod, as required by the manufacturer’s service procedures.

This piston kit is supplied as one unit and is intended for replacement use. Installation should be completed by a qualified technician using the applicable service manual, approved tools, and the correct assembly procedures. Proper preparation, lubrication, ring positioning, and break-in practices are essential for achieving reliable results after installation. Always verify clearances and inspect surrounding engine components before final assembly.

Choose the Namura NA-40013-B Piston Kit when a clearly identified replacement piston solution is needed for compatible engine service. Its dedicated part number and trusted Namura branding help simplify parts selection and support organized maintenance, repair, and rebuild work.

Features:

• Brand: Namura

• Part Number: NA-40013-B

• Product Type: Replacement piston kit

• Application: Designed for compatible engine rebuild and top-end service

• Usage: Supplied as one unit for replacement installation

• Service Support: Suitable for professional repair and maintenance procedures