Vertex Complete Engine Rebuild Kit – Yamaha YFZ450 (2004–2005) (WR101-078 / 0903-1013)

Description

The Vertex WR101-078 Engine Rebuild Kit (0903-1013) provides everything you need to fully restore your 2004–2005 Yamaha YFZ450 engine to factory-level performance and reliability. Designed for riders who demand precision and durability, this kit combines Hot Rods and Vertex components for a complete top and bottom end rebuild in one package.

Ideal for racing, dunes, or trail builds — this is the same proven rebuild kit trusted by professional builders and engine shops worldwide.

What’s Included

✅ Hot Rods heavy-duty crankshaft (stock stroke)
✅ Vertex piston kit (piston, rings, wrist pin, and clips)
✅ Full gasket and O-ring kit (top and bottom end)
✅ Main bearings and seals
✅ Transmission bearing kit
✅ Countershaft bushing and seal kit
✅ Water pump rebuild kit
✅ Cam chain
✅ Oil seal kit

Fitment

📦 Fits all 2004–2005 Yamaha YFZ450 carbureted models:

• 2004 Yamaha YFZ450

• 2005 Yamaha YFZ450

(Does not fit 2006+ YFZ450R EFI models)

Key Features

• Full OEM-quality rebuild kit for top and bottom end

• Includes crankshaft, piston, bearings, and all critical gaskets

• Precision-fit components from Vertex and Hot Rods

• Restores lost power and smooth operation

• One-box solution for complete engine refresh

Warranty Info

Manufactured by Vertex / Wrench Rabbit.
Warranty and technical support are handled directly through Vertex or Wrench Rabbit.

Price & SKU

💲 Retail Price: $1,048.95
SKU: WR101-078 / 0903-1013
Estimated Shipping Weight: 15.9 lb
Handling: Ships next business day