Vortex 251ZB-43 Aluminum Rear Drive Sprocket Pitch Sprockets - CAT5 43-Tooth 520 Black

The Vortex 251ZB-43 is a 43-tooth, 520-pitch CAT5 aluminum rear drive sprocket finished in black anodize with contrasting silver machine cuts. Engineered for sport and performance motorcycle applications, this sprocket delivers a meaningful weight reduction over OEM steel units while maintaining the strength and durability demanded by street and track riders alike.

Key Features:

• Lightweight CAT5 aluminum construction — machined from aerospace-grade 7075-T6 alloy per Vortex's proprietary specifications for an optimal strength-to-weight ratio
• 100% CNC manufactured in the USA — precision machined to the tightest tolerances for consistent fitment and performance
• Vortex patented saber tooth groove design — unique tooth geometry increases sprocket longevity and promotes more efficient power transfer from the chain
• Black anodized finish with silver machine cuts — color anodizing is applied to the sprocket body while sweeps, mud grooves, and teeth retain a bright silver contrast
• 520 pitch compatibility — designed for 520-size chain, making it ideal for stock replacements or lightweight 520 conversions
• 43-tooth rear sprocket — a popular tooth count that balances acceleration and top-end performance across a wide range of sport motorcycles

Vortex sprockets are a proven choice among competitive riders and racing teams worldwide. The CAT5 series represents Vortex's aluminum racing standard, offering a significant upgrade over heavy OEM steel sprockets without sacrificing reliability or service life.