Vortex 251KV4-42 VTX Aluminum Rear Sprocket 42-Tooth

The Vortex 251KV4-42 is a 42-tooth aluminum rear sprocket from Vortex's VTX series, engineered for performance-minded motorcycle riders seeking a lightweight alternative to OEM steel sprockets. Machined from high-grade 7075 aluminum alloy, this sprocket delivers an excellent strength-to-weight ratio while reducing unsprung rotational mass for improved throttle response and acceleration.

Key Features:

• 42-Tooth rear sprocket for optimized final drive ratio tuning
• Precision CNC-machined from 7075 aluminum alloy for lightweight durability
• Hard anodized finish for corrosion resistance and extended wear life
• Precisely cut sprocket teeth for smooth, quiet chain engagement
• Direct OEM replacement fit — no modifications required
• Reduced unsprung weight compared to stock steel sprockets
• Compatible with standard motorcycle drive chains

Vortex is a trusted name in the powersports industry, supplying sprockets to professional racing teams and everyday riders alike. The VTX series rear sprocket is an ideal upgrade for sport bikes and track-day machines where every gram counts. This sprocket is a bolt-on performance upgrade that pairs perfectly with a Vortex front sprocket and a new drive chain for a complete drivetrain refresh.