Designed for motocross racer, lighter weight but stronger chain compare to Heavy Duty Chain.non-sealed chainExcellent quality and cost performance for motocross racers 125cc to 250cc."
"8789
RK 520/525/530XSO are designed for Middle displacement Motorcycle Models, lighten chain weight while securing adequate strength required, emphasizes light feeling of acceleration. RK XSO Series features RX-Ring that...
530 Japanese non seal Heavy Duty chain.RK heavy duty chains are manufactured from carbon alloy steel, heat-treated and shot-peened for maximum strength and durability.Application:250-400cc"
"8943