RK Chains 420H Chain

The RK 420H Chain is a heavy-duty, non-sealed chain designed for smaller displacement motorcycles that demand reliable performance and durability. Featuring quad-riveted pins, this chain offers increased strength and stability under load, improving power transfer from engine to rear wheel. RK’s cold-forged solid bushings enhance rigidity and wear resistance, delivering a stronger, longer-lasting chain compared to traditional designs. Combined with a specially formulated coating, the 420H achieves up to a 40% increase in service life over previous non-sealed chains. Ideal for bikes originally equipped with non-sealed chains, it provides dependable performance for both street and light off-road riding. Built with RK’s proven engineering, it’s a solid upgrade for riders who want durability without unnecessary complexity.

• Heavy-duty non-sealed chain designed for small displacement motorcycles
• Quad-riveted pins for increased strength and improved load stability
• Cold-forged solid bushings for enhanced rigidity and durability
• Special coating provides up to 40% longer chain life
• Efficient power transfer with reduced flex under load
• Tensile strength: 4,100 lbs
• Maximum engine size: 125cc street / 90cc dirt
• Maximum horsepower rating: 15 HP
• Maximum chain width: 16.9 mm
• Includes clip-type master link

Specifications

Part Numbers Specification