Vertex Wrench Rabbit Engine Rebuild Kit – YZ450F (2003–2005)
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Vertex Wrench Rabbit Complete Engine Rebuild Kit – Yamaha YZ450F (2003–2005)
Description
Bring your first-generation YZ450F engine back to factory-fresh performance with the Vertex / Wrench Rabbit Complete Engine Rebuild Kit (WR101-086). This comprehensive 4-stroke rebuild package includes every component needed to overhaul both the top and bottom end—perfect for restoring power, reliability, and smooth operation after high-hour or race use.
Each kit combines Hot Rods, Vertex, and Cometic components, all engineered to exceed OEM durability and precision. Designed as a true one-box solution, it saves time and eliminates the guesswork of sourcing individual parts.
What’s Included
✅ Hot Rods Crankshaft Assembly – fully assembled, trued, and balanced
✅ Vertex Piston Kit – piston, rings, wrist pin, and clips
✅ Complete Engine Gasket Kit – top & bottom end coverage
✅ Oil Seal Kit – premium heat-resistant seals
✅ Main Bearing & Seal Kit – OEM-grade crank bearings
✅ Water Pump Rebuild Kit – includes bearings, seals & impeller gasket
✅ Transmission Bearing Kit – all internal gearbox bearings included
✅ Countershaft Bushing & Seal Kit
✅ Cam Chain – high-strength timing chain
✅ Counter-Balancer Bearing Kit – smooths vibration and enhances longevity
Every piece is precision-matched for a seamless, professional-quality rebuild.
Fitment
📦 Fits the following models:
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Yamaha YZ450F (2003–2005)
Key Features
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Complete top & bottom end rebuild kit
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Premium components from Vertex and Hot Rods
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Restores compression, oil pressure, and crank balance
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Perfect for full engine refresh or preventive maintenance
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Direct bolt-in design—no machining required
Displacement: 450 cc
Engine Type: 4-Stroke
Weight: 15.3 lb
Warranty Info
🛡️ Covered by Vertex / Wrench Rabbit Limited Manufacturer Warranty
All parts meet or exceed OEM standards. Professional installation recommended.
Price & SKU
💲 Retail Price: $1,095.95
SKU: 0903-1021 / WR101-086
Estimated Shipping Weight: 15.3 lb
Handling: Ships next business day
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
