Vortex 527AV4-42 VTX Aluminum Rear Sprocket Chain Sprockets - 42-Tooth 527

The Vortex 527AV4-42 is a 42-tooth VTX series aluminum rear sprocket designed for high-performance motorcycle applications using a 527 pitch chain. Engineered for riders who demand lightweight performance without sacrificing strength, this sprocket is a direct-fit replacement and upgrade option for compatible sport and street bikes.

Vortex sprockets are manufactured from high-grade 7075-T6 aluminum alloy, providing an excellent strength-to-weight ratio that reduces unsprung weight compared to steel sprockets. The anodized finish delivers corrosion resistance and a durable surface that holds up to demanding riding conditions.

Key Features:

• 42-tooth rear sprocket for tunable gearing ratios
• 527 chain pitch compatibility
• 7075-T6 aluminum construction for lightweight, high-strength performance
• Hard anodized finish for corrosion resistance and long service life
• CNC-machined to tight tolerances for precise fitment and smooth chain engagement
• Designed as a direct OEM-style replacement with performance upgrade benefits
• Vortex VTX series — trusted by racers and street riders alike

Whether used for track days or aggressive street riding, the Vortex 527AV4-42 sprocket delivers reliable power transfer and reduced drivetrain weight. Always replace the chain and front sprocket together when installing a new rear sprocket for optimal drivetrain longevity.