Vortex 802AZK-51 Aluminum Rear Sprocket 51-Tooth

The Vortex 802AZK-51 is a high-performance 51-tooth aluminum rear sprocket engineered for serious street and track riders. Manufactured by Vortex Racing, a trusted name in motorcycle drivetrain components, this sprocket is precision-machined from lightweight 7075-T6 aluminum alloy for an ideal balance of strength and weight savings over stock steel sprockets.

The AZK carrier designation identifies the specific hub/carrier pattern designed to fit a range of popular sportbike applications. The hard-anodized finish provides excellent corrosion resistance and surface hardness, extending the service life of the sprocket under demanding riding conditions.

Key Features:

• 51-Tooth rear sprocket — increases rear wheel torque and low-end acceleration
• Lightweight 7075-T6 aluminum construction — significantly reduces unsprung and rotating mass versus steel
• Hard-anodized finish — provides corrosion resistance and surface durability
• Precision CNC machined — tight tolerances ensure smooth chain engagement and even wear
• AZK carrier pattern — fits specific sportbike hub configurations
• Vortex Racing quality — manufactured to OEM and race-grade standards

Upgrading to a higher tooth-count rear sprocket like the 802AZK-51 shortens your overall gearing ratio, delivering stronger pull out of corners and improved low-to-mid range power delivery — a popular modification for track days, tight circuits, and spirited street riding. Always replace your chain and front sprocket together when changing rear sprocket tooth count.