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 140 models (yearly).

• Cagiva: Indiana 650
• Ducati: Indiana 650, Indiana 750
• Honda: CB1100 RC2, CB1100 RD2, CB650 A, CB650 B, CB650 CA, CB650 CB, CB650 LC, CBX400 F, CBX550 FC, CBX550 FD, VTR1000 SP1, VTR1000 SPY
• Kawasaki: GPX 500R, GPZ 500R, GPZ 550H1, GPZ 550H2, H1 500, H1 500A, H1 500B, H1 500C, H1 500D, H1 500E, H1 500F, KH 500A8, Z 440C1, Z 440C2, Z 440C3, Z 440D1, Z 440D2, Z 440D3, Z 440D4, Z 440D5, Z 440D6, Z 440H1, Z 550F1, Z 550F2, Z 650SR, ZR 400A, ZR 550A1, ZR 550A2, ZR 550A3, ZR 550A4
• Suzuki: GS 450ES, GS 450ET, GSX 400EZ, GSX 400FD, GSX 400FE, GSX 400 FJ FAJ, GSX 400 FK FAK, GSX 400 FL FAL, GSX 400FW, GSX 400FX, GSX 400 T Twin, GT 380J, GT 380K, GT 380L, GT 380M, TL 1000R, TL 1000S
• Yamaha: FZ 6002HW, TX 650, XJ 400 5M8 9, XJ 550H, XJ 550J, XJ 550K, XJ 550L, XJ 550M, XS 400B, XS 400C, XS 400D, XS 400SE, XS 650 1H1 3L1, XS 650D, XS 650E, XS 650F, XS 650G, XS 650H, XS 650J, XS 650SE, YX 600 Radian, YZF 750SP