Vortex 527V4-42 V4 Aluminum Rear Sprocket 520 Pitch 42-Tooth

The Vortex 527V4-42 is a high-performance 42-tooth aluminum rear sprocket designed for sport motorcycles running a 520 pitch chain. Machined from lightweight 7075-T6 aluminum alloy, this sprocket delivers an excellent strength-to-weight ratio over OEM steel sprockets, helping reduce unsprung and rotating mass for improved throttle response and acceleration feel.

Vortex engineers each sprocket with precision CNC machining to ensure consistent tooth geometry and chain engagement. The V4 series features hard-anodized teeth for enhanced wear resistance, extending service life even under aggressive riding conditions on the street or track.

Key Features:

• Material: CNC-machined 7075-T6 aluminum alloy
• Teeth: 42-tooth count
• Chain Pitch: 520
• Finish: Hard-anodized for superior wear resistance
• Series: V4 rear sprocket
• Significant weight savings compared to OEM steel sprockets
• Precision CNC machining for accurate tooth profile and consistent chain engagement
• Direct bolt-on replacement — no modifications required

The Vortex V4 aluminum rear sprocket is a popular upgrade for riders looking to fine-tune their gearing ratio for track days or spirited street riding. Going to a larger tooth count like 42T provides increased acceleration and lower-end torque at the expense of a slightly reduced top speed.