Vertex Complete Engine Rebuild Kit – Yamaha YZ125 / YZ125X (2005–2022) (WR101-081 / 0903-1016)

Description

Get your YZ125 or YZ125X back to full race-ready power with the Vertex WR101-081 Complete Engine Rebuild Kit (0903-1016). Designed by Wrench Rabbit, this all-in-one rebuild kit combines Vertex, Hot Rods, and Cometic-quality components to restore compression, smooth crank operation, and factory-level reliability.

Whether you’re refreshing your top and bottom end for racing, trails, or MX training, this kit provides everything you need for a professional-grade rebuild in one box—no extra sourcing required.

What’s Included

✅ Hot Rods heavy-duty crankshaft (stock stroke with wrist pin bearing)
✅ Vertex standard compression piston kit (piston, rings, pin & clips)
✅ Complete engine gasket kit (top & bottom ends)
✅ Oil seal kit
✅ Main bearing & seal kit
✅ Transmission bearing kit (includes output shaft collar and sprocket lock washer)
✅ Counter balancer bearing kit
✅ Water pump bearing & seal kit
✅ Countershaft seal kit
✅ Wrist pin bearing

Fitment

📦 Fits:

• 2005–2021 Yamaha YZ125

• 2020–2022 Yamaha YZ125X

(Fits stock-stroke 125cc 2-stroke Yamaha engines. Direct OEM replacement—no case mods required.)

Key Features

• One-box complete engine rebuild for YZ125 / YZ125X (2005–2022)

• Genuine Vertex and Hot Rods parts ensure OEM fitment

• Restores compression, oil sealing, and crank alignment

• Ideal for full engine restorations, race prep, or high-hour rebuilds

• Designed for precision balance and long-term durability

Warranty Info

Manufactured by Vertex / Wrench Rabbit.
Warranty and tech support available directly from the manufacturer.

Price & SKU

💲 Retail Price: $682.95
SKU: WR101-081 / 0903-1016
Estimated Shipping Weight: 10.3 lb
Handling: Ships next business day