Vortex 920ZK-42 Aluminum Rear Sprocket 42-Tooth 920 Pitch Black

The Vortex 920ZK-42 is a 42-tooth aluminum rear sprocket designed for motorcycles running a 920 pitch chain. Built to race-proven standards, this sprocket is a direct upgrade over heavy OEM steel units, delivering meaningful reductions in rotating mass for sharper throttle response and improved acceleration.

Key Features:

• 42-Tooth, 920 Pitch: Precise tooth count and chain pitch for accurate fitment and smooth power transfer
• 7075 T6 Billet Aluminum Construction: Aerospace-grade alloy delivers an exceptional strength-to-weight ratio
• 100% CNC Machined in the USA: Manufactured to tight tolerances for consistent fit and long service life
• Black Anodized Finish: Corrosion-resistant finish bonds to the aluminum surface for durability and a clean appearance
• Patented Tooth Design: Vortex's unique tooth geometry extends sprocket longevity and promotes smooth chain engagement
• Reduced Rotating Mass: Lighter than OEM steel sprockets, aiding acceleration, deceleration, and directional changes

Vortex Racing has been manufacturing top-quality motorcycle racing drivetrain components in the USA for over 15 years, with products trusted by professional race teams worldwide. The 920ZK-42 rear sprocket is an ideal performance upgrade for riders seeking a lightweight, durable replacement sprocket.