Namura Size A (67.44mm) Piston Kit for KTM 250 SX MXC & EXC Standard Bore 67.5mm

Size A (67.44mm) Piston Kit for KTM

This piston kit for KTM 250 SX, MXC, and EXC models uses a 67.44mm size A piston designed for a standard bore of 67.5mm, providing a drop-in replacement for restoring engine performance.

Overview

The Size A (67.44mm) piston kit for KTM is a complete assembly including a cast piston, rings, wrist pin, and circlips intended for KTM 250cc two-stroke engines. This kit for KTM offers a precise fit for the standard 67.5mm bore and is commonly used in SX, MXC, and EXC models for reliable rebuilding.

Built For Performance

• Precision-machined piston with size A dimensions for proper cylinder clearance
• Includes a high-quality ring set for optimal compression and oil control
• Heat-treated wrist pin reduces wear and improves longevity
• Includes circlips for secure pin retention
• Designed to match KTM stock specifications for seamless installation

Fits These Machines

• for KTM 250 SX
• for KTM 250 MXC
• for KTM 250 EXC

On-The-Job Use

• Piston replacement during top end rebuilds on KTM 250 two-stroke engines
• Ideal for motocross, enduro, and trail riding applications
• Used when restoring lost compression or after piston seizure
• Commonly chosen for performance rebuilds on KTM SX and EXC models

Specs At A Glance

Good To Know

Q: Can this piston be used with a Nikasil-coated cylinder? A: Yes, this piston kit for KTM is compatible with standard Nikasil-plated cylinders as long as the bore is within specification. Always check cylinder condition before installation.

Q: Does the kit include the piston pin bearing? A: No, the piston pin bearing is not included; you will need to reuse or replace it separately. The kit includes the wrist pin, circlips, and rings.

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