Piston Kit Standard Bore 56.00mm Fit for Yamaha DT125 78-81 DT125MX 86-91

Piston Kit Standard Bore 56.00mm for Yamaha DT125 DT125MX

This piston kit standard bore 56.00mm for Yamaha DT125 and DT125MX models replaces worn top-end engine components to restore engine compression and power.

Overview

This piston kit standard bore 56.00mm for Yamaha is designed to revitalize the combustion efficiency of classic two-stroke engines. Featuring a precise 56.00mm standard bore size, this piston kit standard bore 56.00mm includes all necessary rings, wrist pins, and clips for a complete rebuild. Classic motorcycle enthusiasts can rely on this piston kit standard bore 56.00mm to bring back factory-level compression during a top-end overhaul.

Built For Performance

• Cast from high-silicon aluminum alloy for excellent thermal stability and strength
• Precision machined ring grooves ensure optimal ring sealing and heat transfer
• Piston skirt features a friction-reducing coating to minimize cylinder wear
• Includes high-tensile wrist pin and durable retaining clips for reliable assembly

Fits These Machines

• for Yamaha DT125 1978-1981
• for Yamaha DT125MX 1986-1991

On-The-Job Use

• Restores lost engine compression during a standard cylinder top-end rebuild
• Replaces worn or seized pistons on vintage trail bikes to get them running again
• Ensures consistent power delivery for off-road trail riding and vintage restoration projects

Specs At A Glance

Good To Know

Q: Can this standard bore piston be used in a cylinder that has been bored over? A: No, this kit is strictly for standard 56.00mm bores and will not fit cylinders that have been oversized.

Q: Is it necessary to hone the cylinder before installing this new piston? A: Yes, light honing is highly recommended to help the new piston rings seat correctly against the cylinder wall.

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