Vortex CK6240 Chain and Sprocket Kit Conversion with Hardcoat Aluminum Rear Sprocket - 520

The Vortex CK6240 is a complete, ready-to-install chain and sprocket kit engineered for performance-focused riders. This kit includes everything needed for a direct bolt-on installation — no chain cutting required.

The kit features Vortex's SV3 Series 520RV3 chain, manufactured in Japan to strict quality standards. The SV3 chain utilizes a dual pocket sealing system that delivers up to 7 times longer wear life compared to standard O-ring chains, making it an exceptional upgrade over stock drivetrain components.

Kit Specifications:

• Chain: 520RV3 — 122 links
• Chain Type: SV3 Series with dual pocket seal system
• Front Sprocket: 16 teeth (steel)
• Rear Sprocket: 45 teeth, hardcoat aluminum
• OE Gearing: 17/45
• Vortex Kit Gearing: 16/45 (one tooth down in front, stock rear)
• Gearing Type: GFRA (Go Fast) 520 conversion — lower gear ratio for improved acceleration
• Chain Origin: Made in Japan

Key Features:

• Ready-to-install kit — no chain cutting required
• SV3 dual pocket sealing system for extended chain life
• Hardcoat aluminum rear sprocket for reduced weight and enhanced durability
• 520 conversion for a lighter, more efficient drivetrain
• Lower front sprocket ratio delivers quicker acceleration compared to OE gearing
• Manufactured in Japan to the highest industry quality standards

This kit is a 520 conversion that steps down from the OE 17-tooth front sprocket to a 16-tooth front sprocket, resulting in a lower overall gear ratio and noticeably snappier throttle response. Compare OE gearing to Vortex kit gearing to verify gear ratio differences before installation.