Yamaha YZ125 Engine Rebuild Kit (2002–2004) | Vertex WR101-094

Vertex Complete Engine Rebuild Kit – Yamaha YZ125 (2002–2004)

Track-tested. Shop-approved. All-in-one rebuild solution.

The Vertex WR101-094 Engine Rebuild Kit is your complete solution for bringing your 2002–2004 Yamaha YZ125 2-stroke motor back to life. With premium components from Vertex and Hot Rods, this comprehensive kit takes out the guesswork—everything you need is in the box, ready to install.

Whether you're rebuilding for race season or just reviving a classic, this kit delivers OEM-quality fit and long-lasting performance.

What’s Included:

• Hot Rods Crankshaft (stock stroke with wrist pin bearing)

• Vertex Piston Kit (standard compression piston, rings, wrist pin, clips)

• Vertex Complete Gasket Kit (top & bottom end, O-rings, seals)

• Hot Rods Main Bearing & Seal Kit

• Hot Rods Transmission Bearing Kit (with output shaft collar & sprocket lock washer)

• Hot Rods Water Pump Bearing & Seal Kit

• Hot Rods Countershaft / Seal Kit

• Wrist Pin Bearing

Fitment:

• 2002 Yamaha YZ125

• 2003 Yamaha YZ125

• 2004 Yamaha YZ125

For 125cc 2-stroke off-road engines.

Warranty Info:

All parts are new and sourced from trusted OEM-level suppliers. Installation must be completed by a qualified technician. Warranty is void if failure results from improper installation, tuning issues, or misuse. Suspect parts must be returned for inspection before a warranty can be approved.