Vortex 817ZR-51 Steel Rear Sprocket Pitch Sprockets - 520 51-Tooth

The Vortex 817ZR-51 is a 520-pitch steel rear sprocket with 51 teeth, manufactured by Vortex Racing — a U.S.-based brand that has been producing top-quality motorcycle racing components since 1995. Built to exacting tolerances, this sprocket is engineered for durability and consistent performance across street, off-road, and competition applications.

Key Features:

• 520 pitch chain compatibility
• 51-tooth rear sprocket for increased low-end torque and acceleration
• Laser-cut carbon steel construction for extended service life versus aluminum sprockets
• Electroplated satin black finish for corrosion resistance
• Case-hardened teeth for maximum durability under heavy use
• Lightening holes on most applications to reduce rotating mass
• 100% manufactured in the USA
• Made to the tightest tolerances with premium quality materials

The steel construction of the 817ZR-51 offers exceptional longevity, making it an ideal choice for riders who prioritize durability over the weight savings of aluminum. Vortex sprockets are tested on the track with direct feedback from professional race teams worldwide, ensuring race-proven reliability for every rider.