Vortex 920ZK-43 CAT5 Aluminum Rear Sprocket 43-Tooth 520-Pitch

The Vortex 920ZK-43 is a lightweight 43-tooth, 520-pitch aluminum rear sprocket from Vortex Racing's renowned CAT5 lineup. Precision-engineered for street and track riders who demand a measurable performance edge, this sprocket is a direct upgrade over heavy OEM steel units.

Key Features:

• 7075 T6 Billet Aluminum Construction — Manufactured from a specially formulated aerospace-grade alloy per Vortex specifications, delivering an exceptional strength-to-weight ratio
• 100% CNC Machined in the USA — Every sprocket is machined to extremely tight tolerances for precise fitment and consistent performance
• Silver Anodized Finish — Clear anodized coating protects against corrosion and oxidation, extending service life
• Unique CAT5 Tooth Design — Vortex's patented tooth profile reduces wear and increases sprocket longevity
• Gunk-Clearing Grooves — Grooves between each tooth help expel dirt and debris, keeping harmful elements away from the chain interface
• Reduced Rotating Mass — Significantly lighter than OEM steel sprockets, resulting in improved throttle response, acceleration, and overall handling
• 43 Teeth / 520 Pitch — Direct fitment for compatible ZK-series hub applications

Vortex Racing has been the sprocket of choice for professional road racing, motocross, supercross, and flat track teams worldwide. The 920ZK-43 delivers that same race-proven performance and durability for your machine. For maximum sprocket life, Vortex recommends keeping the chain cleaned and properly tensioned every 300–400 miles.