Namura Standard Bore Top End Kit Size B for KTM 65 SX & 65 XC 1998-2008 45mm

Standard Bore Top End Kit Size B for KTM

This standard bore top end kit size B is a direct replacement top end assembly for KTM 65 SX and 65 XC models from 1998 to 2008, with a 45mm bore diameter.

Overview

This standard bore top end kit provides a complete rebuild solution for KTM 65 SX and 65 XC engines. The 45mm bore size matches OEM specifications, ensuring a proper fit and reliable performance. This kit restores compression and power for off-road riding.

Built For Performance

• Includes piston, rings, wrist pin, and circlips
• Standard bore size of 45mm for stock cylinder
• Size B specification for precise clearance
• Compatible with KTM 65 SX and 65 XC 1998-2008
• High-quality aluminum alloy for durability
• Precision-machined for consistent performance

Fits These Machines

• for KTM 65 SX (1998-2008)
• for KTM 65 XC (1998-2008)

On-The-Job Use

• Rebuilding top end for motocross and off-road racing
• Restoring engine compression on KTM 65 SX and 65 XC
• Performing seasonal engine maintenance for competitive riding
• Replacing worn piston assembly during full engine overhaul

Specs At A Glance

Good To Know

Q: Does this kit include a gasket set? A: This top end kit includes the piston, rings, wrist pin, and circlips, but does not include a gasket set. Gaskets should be purchased separately for a complete rebuild.

Q: Is this kit suitable for a cylinder that has been bored oversize? A: No, this is a standard bore kit designed for stock cylinder dimensions. If your cylinder has been bored, use an oversized kit.

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