Vortex 317ZLV4-43 V4 Aluminum Rear Sprocket 43T

The Vortex 317ZLV4-43 is a 43-tooth aluminum rear sprocket built on Vortex's next-generation V4 design — an evolution of their iconic CAT5 platform. The V4 pattern delivers a 10–15% reduction in weight over the CAT5 without sacrificing structural integrity, achieved through an optimized cutout design with machined faces on both sides. This makes it an ideal choice for road racing, motocross, flat track, and any application where reducing rotating mass is a priority.

Key Features:

• V4 ultra-light design — 10–15% lighter than the classic CAT5 sprocket
• 100% CNC machined in the USA to tight tolerances
• 7075 T6 billet aluminum construction — specially formulated alloy per Vortex specifications
• Patented tooth profile — unique Vortex tooth geometry extends sprocket longevity
• Silver finish with clear protective coating applied before cutting, producing the signature two-tone machined look
• 43 teeth — suitable for tuning low-end torque and acceleration
• Designed to work with the correct OEM or aftermarket chain pitch — always match chain pitch to sprocket pitch

Vortex aluminum sprockets are a favorite among competitive riders due to the significant weight savings they provide over steel. For best results, keep the chain clean and properly tensioned every 300–400 miles to maximize sprocket life. Vortex Racing has been manufacturing precision motorcycle drivetrain components in the USA since 1995, with components trusted by professional race teams worldwide.