Vortex 817ZB-42 42-Tooth Steel Rear Sprocket Zirconium Black

The Vortex 817ZB-42 is a 42-tooth steel rear motorcycle sprocket finished in a striking zirconium black anodized coating. Built to Vortex Racing's exacting standards, this sprocket is engineered for riders who demand race-proven durability and consistent performance on both the street and track.

Key Features:

• 42-Tooth Steel Construction — Carbon steel alloy formulated to Vortex's proprietary specifications for superior strength and wear resistance
• Zirconium Black (ZB) Finish — Electro-plated satin black anodized coating helps prevent corrosion and delivers an aggressive blacked-out look
• Patented Tooth Profile — Vortex's unique tooth geometry extends sprocket longevity and improves chain engagement
• 100% CNC Machined in the USA — Manufactured domestically to the tightest tolerances in the industry
• Race-Tested Design — Developed with direct feedback from top professional race teams competing in Motocross, Supercross, and Road Racing

The Vortex 817ZB-42 is a direct OEM-style replacement rear sprocket that delivers enhanced durability over stock. Whether you're upgrading worn factory components or fine-tuning your gearing ratio, this sprocket provides a reliable, high-performance solution backed by Vortex Racing's decades of motorsport expertise.