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Vortex Aluminum Rear Sprocket 520 — Black (642AZK)

Part # 642AZK-41
Item #642AZK-41
Fits 7 motorcycles
  • Yamaha
    • MT 09 · 2021–2026
    • MT 09 SP · 2021–2026
    • FJ 09 · 2021–2026
    • XSR900 · 2022–2026
    • YZF R1 · 2015–2026
    • YZF R1M · 2015–2026
    • YZF R6 · 1999–2002
$65.41
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Teeth
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Vortex Aluminum Rear Sprocket 520 — Black (642AZK)
Product Details

Vortex aluminum rear sprockets are 100% CNC-machined performance replacements that reduce rotating mass compared to stock steel, available in 420 and 525 chain pitches in black and silver anodized finishes. A unique tooth profile and weight-saving cutouts make them a straightforward drivetrain upgrade for street and track riders.

  • 100% CNC-machined aluminum for improved concentricity over cast or stamped alternatives
  • Lightweight construction reduces rotating mass compared to OEM steel sprockets, supporting faster acceleration response
  • Unique tooth design extends sprocket service life
  • Weight-saving cutouts further reduce rotating weight
  • Anodized finish in black and silver; covers 420 and 525 chain pitches

Spec: Position: Rear · Teeth: 41 · Material: Aluminum · Finish: Black · Chain Pitch: 520

Fitment

  • Yamaha MT 09 2021–2026
  • Yamaha MT 09 SP 2021–2026
  • Yamaha FJ 09 2021–2026
  • Yamaha XSR900 2022–2026
  • Yamaha YZF R1 2015–2026
  • Yamaha YZF R1M 2015–2026
  • Yamaha YZF R6 1999–2002

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