Sunstar 520 Works-Z Rear Sprocket

Item # : 175166

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Sunstar 520 Works-Z Rear Sprocket

Sunstar is the largest OEM supplier of sprockets and brake rotors in the world. In fact, your motorcycle probably came from the factory with a Sunstar sprocket.


  • Weighs up to 50% lighter than standard steel sprockets.
  • 100% heat treated AND even lighter than before with new weight reduction hole cut outs, but still has a hardness 5 times that of an aluminum sprocket and twice that of a standard steel sprocket.
  • Up to 4 times more durable with 1.2 times the lateral strength of any aluminum sprocket.
  • Great self cleaning capabilities due to the offset tooth design, same as the original Z sprocket which extends the life of the entire chain drive system.
  • The lightest STEEL sprocket available on the market.
  • *Note: Part is bike specific, may vary from image.