Vortex 641ZR-51 Aluminum Rear Sprocket 520 Pitch 51 Tooth Red

The Vortex 641ZR-51 is a high-performance aluminum rear sprocket designed for serious riders who demand both weight savings and durability. This 51-tooth sprocket features Vortex's signature red anodized finish and is engineered for 520 pitch chain applications.

Key Features:

• 51-tooth configuration for customized gearing ratios
• 520 pitch compatibility for reduced rotating mass
• 100% CNC machined in the USA from specially formulated aerospace-grade aluminum alloy
• Red anodized finish for corrosion resistance and distinctive appearance
• Patented tooth design with Saber tooth grooves increases sprocket longevity
• Lightweight construction reduces unsprung weight for improved acceleration and handling
• Strategic lightening holes further reduce rotating mass without compromising strength
• Precision machined to ensure perfect concentricity and balance

Vortex Racing has been manufacturing premium motorcycle components since 1995, with direct input from professional race teams worldwide. Each sprocket is manufactured to the tightest tolerances to ensure reliable performance on both street and track applications. The lightweight aluminum construction offers significant weight savings over OEM steel sprockets while the hard anodized surface treatment provides excellent wear resistance.