2001 Yamaha YZ125 Complete Engine Rebuild Kit – Vertex WR101-125 / 0903-1099

One kit. Full rebuild. Factory-level results.
This complete engine rebuild kit from Vertex and Wrench Rabbit is built specifically for the 2001 Yamaha YZ125 2-stroke. Designed for riders who want everything in one box, this kit includes a heavy-duty Hot Rods crankshaft, standard compression Vertex piston, and all necessary bearings, gaskets, and seals.

Whether you're doing routine maintenance or a full teardown, this kit restores performance, reliability, and peace of mind.

What’s Included:

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

• Hot Rods Crankshaft (OEM stroke w/ wrist pin bearing)

• Hot Rods Main Bearing & Seal Kit

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

• Hot Rods Counter Balancer Bearing Kit

• Hot Rods Water Pump Rebuild Kit

• Vertex Complete Engine Gasket Kit (top & bottom end with O-rings)

• Countershaft Bushing & Seal

• Wrist Pin Bearing

Fitment:

• 2001 Yamaha YZ125

Warranty:
Covered by a limited manufacturer warranty. Contact us for details or support.