RK Racing Chains have been chosen by more FIM World Championship teams and AMA World Superbike/Super-Sport Teams than any other chain in the past 25 years! All RK Motocross chains utilize special heat treated hi-carbon steel components with solid rollers and bushings.Pre-stressed for maximum performancePre-stretched for long lifeO-Ring designClip-type master linkMax cc for street/offroad: 400/400Tensile strength lbs/ft: 7,700
- RK’s traditional round O-ring chain is a convenient blend of performance and affordability
- SO’s O-ring is constructed from Nitrite Butadiene to seal in lubrication and deliver smooth power with minimal seal ring drag or loss of horsepower
- 520SO chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains
- 520SO can be used for both on street and off-road up to 400ccs
- Tensile Strength: 6,900 lbs; Max CC Rating: 400cc Street, 400cc Off-road/ATV; Max Horsepower: 60 HP; Weight per 100 Links: 3.39 lbs; Max Chain Width: 21.7mm; Master Link Included: Clip type
- RK’s traditional round O-ring chain is a convenient blend of performance and affordability
- SO’s O-ring is constructed from Nitrite Butadiene to seal in lubrication and deliver smooth power with minimal seal ring drag or loss of horsepower
- 520SO chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains
- 520SO can be used for both on street and off-road up to 400ccs
- Tensile Strength: 6,900 lbs; Max CC Rating: 400cc Street, 400cc Off-road/ATV; Max Horsepower: 60 HP; Weight per 100 Links: 3.39 lbs; Max Chain Width: 21.7mm; Master Link Included: Clip type
