Vertex Complete Engine Rebuild Kit WR00003 — KTM 50 SX 2004-2008

Vertex Complete Engine Rebuild Kit WR00003 — KTM 50 SX 2004-2008

Product Description

When your young rider's KTM 50 SX needs a mechanical refresh to get back to the top of the podium, the Vertex Complete Engine Rebuild Kit (WR00003) is the ultimate solution. This "one-stop-shop" master kit combines industry-leading Vertex piston technology with the proven durability of Hot Rods crankshaft and bearing components to provide a complete, factory-spec overhaul.

Designed for the high-demand 50cc racing environment, this kit simplifies the complex task of sourcing parts by bundling every essential internal component into one convenient, high-performance package. Ensure reliable power and longevity for your 50cc machine with these precision-engineered parts.

What’s Inside the Box:

• Vertex Piston Kit: Standard compression piston, high-performance rings, wrist pin, and circlips.
• Hot Rods Heavy-Duty Crankshaft: Stock stroke, pre-assembled with the essential wrist pin bearing.
• Hot Rods Main Bearing & Seal Kit: Engineered for maximum reliability under high-RPM racing conditions.
• Hot Rods Transmission Bearing Kit: Includes all transmission bearings, output shaft collar, and sprocket lock washer.
• Hot Rods Counter Balancer Bearing Kit: Critical components for maintaining smooth, vibration-free engine operation.
• Hot Rods Water Pump Bearing & Seal Kit: Complete cooling system refresh components.
• Vertex Complete Gasket & Seal Kit: A total top-and-bottom-end solution, including all O-rings and high-quality seals required for a leak-free assembly.

Fitment List

Year Range	Vehicle Model Series
2004-2005	KTM 50 SX Pro Junior / Pro Senior
2006-2008	KTM 50 SX

Expert Pro-Tip:

Precision is paramount when rebuilding small-displacement, high-RPM 2-stroke engines. Ensure your engine cases are meticulously cleaned of all debris and oil before installing your new Hot Rods bearings. Using professional tools—such as a crank puller and a case splitter—is highly recommended to avoid damaging the cases during assembly. Always verify your ring end gap to ensure optimal compression before sealing the top end.

Recommended Pairings

• Pro-Grade Engine Rebuild Tools
• High-Performance Premix & Gear Oils

At Moto-House MX, we specialize in high-performance off-road parts. With over 40 years of industry experience, our team ensures you get the right parts for your machine the first time. We ship worldwide from our Central Florida facility.

Moto-House MX – Choice of Champions – Clermont / Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.