Vertex Top End Piston Kit VTK22991A (51.95mm) — KTM 105 SX/XC 2004-2011

Vertex Top End Piston Kit VTK22991A — KTM 105 SX & XC 2004-2011 (51.95mm)

Product Description

Ensure your KTM 105 SX or XC stays at the front of the pack with the Vertex Top End Piston Kit (VTK22991A). This comprehensive kit provides a direct, high-quality cast OE replacement, engineered to restore factory-spec compression and performance to your 105cc 2-stroke engine.

Vertex cast pistons utilize an 18% silicone-content gravity-cast aluminum alloy, a material choice that offers exceptional dimensional stability even under the high-heat cycles of intensive racing. The high-tech Molybdenum Disulphite (MoS2) skirt coating minimizes friction, allowing for a faster, safer break-in period and providing long-term protection against cylinder wall scuffing.

Top Features: Vertex Top End Piston Kit

• All-in-One Refresh: Complete top-end kit including the 51.95mm cast piston, rings, wrist pin, circlips, essential top-end gaskets, and a high-load wrist pin bearing.
• Factory Precision: Designed as a direct OE replica for reliable, perfect fitment.
• Advanced Aluminum Alloy: Features 18% silicone content to prevent thermal distortion and maintain structural integrity.
• Moly-Coated Skirt: Reduces friction and helps the engine reach operating temperature more efficiently with a quicker break-in.
• T-5 Heat Treated: Undergoes a specialized hardening and tempering process for extended service life.

Fitment List

Year Range	Vehicle Model
2004-2011	KTM 105 SX
2008-2009	KTM 105 XC

Frequently Asked Questions

Q: Should I hone my cylinder before installing this piston?
A: Yes. Whenever installing a new piston and rings, it is highly recommended to perform a light, professional hone of the cylinder. This de-glazes the surface, which is essential for proper ring seating and establishing a correct oil film for engine longevity.

Expert Pro-Tip: Always check the ring end gap inside your specific cylinder before final assembly. A quick measurement now ensures the rings won't bind at high operating temperatures, protecting your fresh top-end from damage.

Recommended Pairings

• Essential Off-Road Motorcycle Tools
• High-Performance Premix Oils

At Moto-House MX, we specialize in high-performance off-road parts. Our team has over 40 years of experience helping riders get the most out of their machines. Every order ships fast from our Central Florida location.

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