4752M05500 Wiseco Piston Kit for Yamaha TTR125 2000-2023 .040 55mm

Wiseco .040 Piston Kit for Yamaha TTR125

This Wiseco .040 over piston kit for Yamaha TTR125 delivers a 55 mm bore and 11:1 compression ratio, cross-referencing OEM part 4752M05500 for a direct rebuild solution.

Overview

This Wiseco .040 piston kit for Yamaha TTR125 is a forged replacement assembly built to restore top-end power on worn or damaged engines. The 55 mm bore and 11:1 compression ratio make it a solid choice for riders rebuilding a tired top end. It suits home mechanics and shops working on 2000 through 2023 TTR125 machines.

Built For Performance

• Forged piston construction for added strength under load
• 55 mm bore with .040 oversize to clean up a worn cylinder
• 11:1 compression ratio for strong, responsive power
• Kit includes piston, rings, wrist pin, and circlips
• Cross-references OEM part 4752M05500
• Designed for the Yamaha TTR125 engine family

Fits These Machines

• for Yamaha TTR125 (2000-2023)
• for Yamaha TTR125E (2000-2023)
• for Yamaha TTR125L (2000-2023)
• for Yamaha TTR125LE (2000-2023)

On-The-Job Use

• Top-end rebuilds on high-hour trail bikes
• Cylinder clean-up when a bore needs to go oversize
• Restoring compression on a smoky or hard-starting engine
• Routine refresh during a full engine service

Specs At A Glance

Good To Know

Q: Does this kit require boring the cylinder? A: Yes, the .040 oversize piston needs the cylinder bored and honed to match the 55 mm bore before assembly.

Q: Is a gasket kit included? A: No, top-end gaskets are sold separately, so order them alongside this piston kit for a complete rebuild.

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