Namura Size B (55.95mm) Piston Kit for KTM 150 SX XC & 144 SX Standard Bore 56mm

Namura Size B (55.95mm) Piston Kit for KTM 150 SX XC & 144 SX

This aftermarket piston kit is designed for KTM 150 SX, XC, and 144 SX motorcycles, featuring a 55.95mm diameter piston for standard 56mm bore engines.

Overview

This Namura Size B piston kit provides a direct replacement for the original piston in KTM 150 SX, XC, and 144 SX models. Built for precision, the piston kit delivers reliable performance in motocross and off-road riding. The 55.95mm diameter ensures a proper fit for standard 56mm bores.

Built For Performance

• Size B piston with 55.95mm diameter for precise clearance
• Manufactured from high-strength aluminum alloy for durability
• Includes piston rings and wrist pin for complete installation
• Designed to maintain compression in high-performance two-stroke engines
• Direct replacement for OEM KTM piston in designated models

Fits These Machines

• for KTM 150 SX
• for KTM 150 XC
• for KTM 144 SX

On-The-Job Use

• Ideal for motocross track use where high RPM and reliability are critical
• Suitable for off-road trail riding and enduro events
• Commonly used in competition bikes requiring consistent power delivery
• Commonly used in rebuilding KTM two-stroke engines to factory specifications

Specs At A Glance

Good To Know

Q: Can this piston kit be used with a stock cylinder? A: Yes, the 55.95mm piston is designed for a standard 56mm bore cylinder, but always check clearance and cylinder condition.

Q: Does this kit come with a gasket set? A: No, this kit includes the piston, rings, and wrist pin; gaskets are sold separately.

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