Vortex 642CZBV4-43 V4 Aluminum Rear Sprocket 43-Tooth

The Vortex 642CZBV4-43 is a 43-tooth aluminum rear sprocket built around Vortex Racing's next-generation V4 sprocket design. Introduced in 2026 as an evolution of the legendary CAT5, the V4 delivers a 10–15% reduction in weight over its predecessor without sacrificing structural integrity, making it an ideal choice for road racing, flat track, motocross, and performance street riding.

Like all Vortex aluminum rear sprockets, the 642CZBV4-43 is 100% CNC machined in the USA from a specially formulated aluminum alloy engineered to Vortex's exacting specifications. The V4's redesigned carrier pattern focuses material precisely where it is needed most, with machined faces on both sides for a clean, performance-focused aesthetic and reduced rotating mass.

Key Features:

• V4 Design — 10–15% lighter than the CAT5 with no loss in strength
• 43-Tooth rear sprocket configuration
• 100% CNC manufactured in the USA
• Specially formulated aluminum alloy per Vortex specifications
• Unique Vortex patented tooth design for increased sprocket longevity
• Machined faces on both sides for two-tone appearance
• Silver anodized clear coat finish to help prevent oxidation
• Reduces rotating mass for improved acceleration, deceleration, and throttle response

Aluminum sprockets are the preferred choice for racers and performance riders who prioritize weight savings. Vortex recommends cleaning the chain and checking tension every 300–400 miles to maximize the service life of aluminum sprockets. The 642CZBV4-43 is a direct-fit sprocket — always confirm wheel carrier bolt pattern compatibility before ordering.