RK 420MXZ Gold Chain Motocross Heavy Duty
All RK chains are pre-stressed and pre-stretched to ensure equal load distribution and minimal maintenance.
They’re made of the highest grade medium carbon alloy steel available, with all components shot-peened and heat-treated.
Made for the serious motocross racer with all components heat-treated for high performance durability.
Feature chromoly steel construction with seamless rollers and bushings, and oversized alloy pins for added strength.
Ideal for professional level from 80cc to 150cc open class racing.
Wear Life Index std. as 100: 300
Tensile strength: 5000 lbs .
Disp. max cc's: Street 150 Dirt 125
Includes CLIP TYPE master link.