Namura Size A (66.34mm) Piston Kit for KTM 250 SX MXC & EXC Standard Bore 66.4mm

Namura Size A Piston Kit for KTM 250 SX MXC & EXC

This Namura Size A piston kit with a 66.34mm diameter is an aftermarket replacement for KTM 250 SX, MXC, and EXC models, designed for a standard bore size of 66.4mm.

Overview

The Namura Size A (66.34mm) piston kit offers a high-quality replacement for KTM 250 two-stroke engines including the SX, MXC, and EXC series. It provides reliable compression and performance for standard bore applications, making it a popular choice for rebuilding KTM 250 powerplants.

Built For Performance

• Precision-machined 66.34mm piston for standard 66.4mm bore
• Includes piston rings, wrist pin, and circlips for a complete kit
• High-strength aluminum alloy for durability under high RPM
• Designed to meet or exceed OEM specifications for KTM 250 models

Fits These Machines

• for KTM 250 SX (2000-2006)
• for KTM 250 MXC (2000-2006)
• for KTM 250 EXC (2000-2006)

On-The-Job Use

• Motocross racing on closed courses
• Enduro and off-road trail riding
• Cross-country competition
• Engine rebuilds and top-end refresh

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with any KTM 250 model? A: This kit is specifically designed for KTM 250 SX, MXC, and EXC models from the early 2000s; always confirm your engine's bore size and year.

Q: What is the difference between Size A and other piston sizes? A: Size A pistons are standard replacement size for a normal bore; oversize pistons (B, C, etc.) are used when cylinders are bored out after wear.

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