SO Chain

Japanese economical O-ring chain

RK 520SO  is a Classic ! The best choice if you are looking for an economical chain for motorcycle from 250cc to 400cc. 

RK utilizes Nitrite Butadiene O-Rings to seal in lubrication and deliver smooth power with minimal loss of horsepower.

RK’s sealed-ring chains received the spotlight back in 1978 during Suzuka 8 hours endurance racing. While it was common for riders to change their non-sealed chains at least three times during the race. Racers riding with RK’s sealed chains achieved the win with only ONE chain!

Developed with Polaris ATV with Special Heat Treatment for Off-road Usage.



RK EUROPE / 520SO
520SO O-RING CHAIN
  • Tensile Strength: 30.5kN
  • Application: 250cc / 400cc
  • Master Link Included: Clip/Rivet type
  • Weight: 1.54Kg/100L
RK EUROPE / 520soRK EUROPE / gb520so

You may be intrested by:

520SO seal520XSO seal
520SO520XSO
Tensile Strength30,5 Kn36.5 Kn
Application Cyl.250cc / 400cc250cc / 800cc
Master Link IncludedClip/Rivet typeClip/Rivet type
Weight/100L1,54 Kg1,56 Kg
ApplicationATV - STREET RIDING - DAILY USESTREET RIDING - TOURING
Seal TypeO-RING sealRX-RING seal

Available in
520

RK EUROPE - MADE IN JAPAN CHAIN

Main point

  • For Street Riding & Daily Use
  • For ATV
  • O seal ring
  • About 10 000 km
  • Economical Choice 
  • 3 times longer life than non seal chain