There are many chain manufacturers in the motorcycle industry but most (including some Japanese manufacturers) only offer a single type of sealing ring, using a "one type fits all approach" which is used on all their drive chains.

This can be inefficient depending on the intended use. .

Different types of seals for different applications maximises efficiency and performance

RK currently has FIVE types of sealed-ring chains. Each has its own features and benefits.

• O ring and RX Rings came first. Each a great product in their own right and broadly similar to the competition's current offerings.
• After several years of development, RK added the XW range of sealed chains to radically improve chain life and performance.
• As racing expanded into several different genres, RK also added the ultra thin U-Ring and UW-Ring sealed chains.
• Each seal type is specifically designed for a particular use to provide the ultimate in rotating efficiency with minimum friction, while providing a longer chain life.
• Do not compromise: Maximise the motorcycle's performance by fitting RK chain. Mark Marquez does and he does pretty well...

Affordable, long lasting performance RX sealed chain. The XSO series offers less torsional friction and increased performance.

XSO chains provide up to 7 times longer wearlife compared to standard chains.

Fitment Summary
Compatible with 86 models (yearly).

• Ducati: Hypermotard 1100, Hypermotard 1100Evo, Hypermotard 1100 S Evo Corse, Hypermotard 1100SP, Hypermotard 1100 SP Evo, Hypermotard 1100 SP Evo Corse, Hypermotard 796 Brembo 4-Pist radial caliper, Monster 1000S2R, Monster 1100 Brembo 4-Pist radial caliper, Monster 1100 Diesel, Monster 1100Evo, Monster 1100 Evo Anniversary, Monster 1100S, Streetfighter 848, Streetfighter 848SP, Streetfighter 848 Strada
• Honda: CB1400 Steed, VFR400 R3, VFR400 RK, VFR400 RL, VFR400 RM, VFR400 RN, VFR400 RP
• Kawasaki: W 650 A C 1, W 650 A C 2, W 650 A C 3, W 650 A C 4, W 650 A C 5, W 650 A C 6, W 650 A C 7, W 650 A C 8, W 650 A C 9
• Triumph: Bonneville 800, Bonneville 800 908MD, Bonneville 800 T100, Bonneville 865SE, Bonneville 865 Steve McQueen, Bonneville 865 T100
• Yamaha: FZR 400 Genesis, FZR 400R, FZR 400 R SP EXUP