
Professional Service OEM 520 Aftermarket Motorcycle Chain for Race and Street Bikes Green Color. Extended Service Life: X-Ring seal technology extends service life by 1.5x compared to standard O-ring chains. Premium Alloy Steel: Made from high carbon alloy steel with heat treatment for superior strength and wear resistance. OEM & ODM Customization: Supports full customization including color, tensile strength, and product type for OEM/ODM needs. ISO 9001 Certified: Manufacturing process and quality control certified under ISO 9001:2001 standards. Low Friction Design: X-Ring and solid bush design reduces friction, noise, and stretching for smooth power transmission. Lifelong Warranty: Provides lifelong service and free replacement for products with manufacturing defects. Wide Compatibility: Suitable for street, racing, and off-road bikes; matches all market sprockets up to 1100cc. Global Export Quality: Audited by leading global brands and exported to over 50 countries including US, Japan, and Germany.