Namura Standard Bore Size C Top End Repair Kit for Yamaha YZ250 1995-1998 68mm

Standard Bore Size C Top End Repair Kit for Yamaha

This complete top end repair kit, sized C with a 68mm bore, rebuilds the cylinder and piston assembly for Yamaha YZ250 motorcycles from 1995 to 1998, restoring compression and power.

Overview

The Namura Standard Bore Size C Top End Repair Kit is a comprehensive set for refreshing the Yamaha YZ250’s cylinder. It includes a piston, rings, wrist pin, and circlips, delivering reliable performance for off-road riding. This top end repair kit is engineered to match OEM specifications for a direct fit on 1995-1998 YZ250 models.

Built For Performance

• 68mm standard bore size for precise cylinder matching
• High-silicon aluminum alloy piston for durability
• Chrome-plated rings reduce friction and improve seal
• Wrist pin and circlips included for a complete rebuild
• Designed for use with OEM cylinder or replated cylinder

Fits These Machines

• for Yamaha YZ250 (1995-1998)

On-The-Job Use

• Motocross racing and off-road competition
• Trail riding and enduro events
• Rebuilding worn-out top end during engine overhaul
• Performance restoration after hours of hard use

Specs At A Glance

Good To Know

Q: Does this kit include a cylinder? A: No, this is a top end repair kit that includes the piston assembly only; the cylinder must be in good condition or replated separately.

Q: Is the piston pre-gapped? A: The rings are not pre-gapped; you should file-fit the rings to your cylinder bore for proper clearance.

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