Vertex WR00003 Engine Rebuild Kit - KTM 50 SX / Pro Junior / Senior (2004-2008)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
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The Vertex WR00003 Complete Engine Rebuild Kit (0903-1630) is a full OEM-grade rebuild solution for KTM 50cc 2-stroke engines. Designed for 2004-2008 KTM 50 SX, Pro Junior, and Pro Senior models, this all-inclusive package brings factory performance and reliability back to your mini racer.
✓ Fits:
- 2006-2008 KTM 50 SX
- 2004-2005 KTM 50 SX Pro Junior
- 2004-2005 KTM 50 SX Pro Senior
- (Fits 50cc 2-stroke KTM mini motocross engines)
✓ Features:
- One-box rebuild solution with OEM-quality parts
- Vertex piston and Hot Rods crank ensure factory-spec reliability
- Includes all critical bearings, gaskets, and seals
- Perfect for full motor overhauls or race-ready maintenance
- Engineered for performance and longevity in youth competition engines
✓ What's Included:
- Vertex WR00003 Engine Rebuild Kit - KTM 50 SX / Pro Junior / Senior
Ships fast from DuneGoonShop!
📦 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.
