Regina Chain KH125 520 ZRT Chain and Sprocket Kit

The Regina Chain KH125 is a complete chain and sprocket drive kit built around Regina's high-performance 520 ZRT Z-ring chain series. Designed as a convenient all-in-one replacement for the motorcycle's secondary drivetrain, the kit includes a precut chain, front sprocket, and rear sprocket — everything needed for a full drive system service in a single package.

The 520 ZRT chain features gold outer plates and Z44 Z-ring seals that retain lubrication in the critical pin-and-bushing area, significantly reducing friction and wear compared to standard O-ring chains. The chain is assembled with solid bushings and rollers, and plates, pins, and rollers are shot-peened to increase fatigue resistance. Pre-stretching during manufacturing improves dimensional stability and reduces break-in elongation. A rivet-type master link is included.

Key Features:

• 520 ZRT Z-ring chain with gold outer plates for enhanced durability and appearance
• Z44 sealing rings provide superior lubrication retention over standard O-rings
• Tensile strength of 34,800 N (7,823 lb) for reliable power transfer
• Heat-treated front sprocket and induction-hardened rear sprocket made from high-quality steel
• OEM sprocket gearing maintained for stock power delivery and feel
• Rivet-type master link included for a secure, permanent connection
• Precut chain length for straightforward installation
• Manufactured in Italy by Regina Catene Calibrate — a trusted name in motorcycle drive chains since 1919

The KH125 kit is part of Regina's touring street chain lineup, engineered for high mileage with minimal elongation, making it an excellent OEM-quality replacement for riders seeking long service life and reliable performance.