Namura Top End Repair Kit for Yamaha DT125LC MTX125 RD125LC .040 Over Bore 57mm

Namura Top End Repair Kit for Yamaha

This Namura top end repair kit is designed for Yamaha DT125LC, MTX125, and RD125LC models, featuring a .040 oversize bore at 57mm to restore engine compression and performance.

Overview

This top end repair kit from Namura includes all necessary components for rebuilding the cylinder and piston assembly on Yamaha 125cc two-stroke engines. It is specifically intended for the DT125LC, MTX125, and RD125LC models when a .040 over bore is required, helping to bring worn engines back to like-new condition. The kit provides a reliable solution for restoring power and extending engine life.

Built For Performance

• Precision-machined piston with .040 oversize for a tight cylinder fit
• Durable ring set reduces blow-by and maintains compression
• Complete gasket set ensures a leak-free seal
• Manufactured to strict tolerances for consistent performance
• Includes wrist pin and circlips for secure piston installation

Fits These Machines

• for Yamaha DT125LC
• for Yamaha MTX125
• for Yamaha RD125LC

On-The-Job Use

• Restoring top-end performance in vintage Yamaha enduro and street bikes
• Rebuilding engines after a top-end failure or worn piston
• Replacing original cylinders with an overbore to eliminate scoring
• Maintaining competition bikes for motocross or trail riding

Specs At A Glance

Good To Know

Q: Will this kit work with a standard bore cylinder? A: No, this is specifically for a .040 over bore; you must have your cylinder bored to 57mm to use this kit.

Q: Does the kit include a cylinder? A: No, only the top end components such as piston, rings, wrist pin, circlips, and gaskets are included.

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