Namura Size A Piston Kit for KTM 50 SX Pro Jr Sr Mini Junior STD Bore 39.50mm

Namura Size A Piston Kit (STD Bore 39.50mm) for KTM

This Namura Size A piston kit with STD bore 39.50mm is designed for KTM 50 SX Pro Jr Sr Mini Junior models, replacing worn pistons.

Overview

This Namura Size A piston kit is a direct replacement for KTM 50 SX Pro, Jr, Sr, Mini, and Junior models, featuring a standard bore of 39.50mm. It restores compression and performance in two-stroke engines, making it a popular choice for rebuilds.

Built For Performance

• Precision-machined from high-quality aluminum alloy
• Includes rings, wrist pin, and circlips
• STD bore size 39.50mm for original spec rebuilds
• Balanced weight for reduced vibration
• Designed to meet OEM tolerances

Fits These Machines

• for KTM 50 SX Pro
• for KTM 50 SX Jr
• for KTM 50 SX Sr
• for KTM 50 SX Mini
• for KTM 50 SX Junior

On-The-Job Use

• During top-end engine rebuilds
• For competition and recreational riding
• When restoring older mini dirt bikes

Specs At A Glance

Good To Know

Q: Does this kit include the piston rings? A: Yes, the kit comes with rings, wrist pin, and circlips for a complete installation.

Q: Is this piston suitable for high-RPM use? A: Yes, Namura pistons are designed to handle the RPM range of these small two-stroke engines.

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