Vortex 839ZK-42 Aluminum Rear Sprocket 42-Tooth 520-Pitch

The Vortex 839ZK-42 is a lightweight aluminum racing rear sprocket designed for high-performance motorcycles. This 42-tooth sprocket features a 520 chain pitch and is part of Vortex Racing's premium line of drive components trusted by professional racers worldwide.

Key Features:

• 100% CNC machined in the USA from specially formulated 7075-T6 aluminum alloy
• Anodized finish to prevent corrosion and provide a distinctive appearance
• Patented tooth design with saber tooth grooves increases sprocket longevity
• Lightweight construction reduces rotating mass for improved acceleration, deceleration, and directional changes
• Manufactured to the tightest tolerances with direct feedback from top professional race teams
• 42-tooth count for 520-pitch chain applications

Vortex Racing sprockets are the racer's choice for their exceptional quality, precision manufacturing, and proven track performance. Each sprocket is engineered to put more power to the pavement while withstanding the demanding conditions of motocross, supercross, road racing, and flat track competition.