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 122 models (yearly).

• Honda: CB650 A, CB650 B, CB650 Z, CB750 F, CB750 F1, CB750 F2, FT400 Ascot, VTR1000 F1, VTR1000 F2, VTR1000 F3, VTR1000 F4, VTR1000 F5, VTR1000 F6, VTR1000 FV, VTR1000 FW, VTR1000 FX, VTR1000 FY
• Kawasaki: GPX 600R, GPZ 305A3, GPZ 305B10, GPZ 305B11, GPZ 305B12, GPZ 305B13, GPZ 305B14, GPZ 305B15, GPZ 305B16, GPZ 305B3, GPZ 305B4, GPZ 305B5, GPZ 305B6, GPZ 305B7, GPZ 305B8, GPZ 305B9, GPZ 600R, Z 650B1, Z 650B2, Z 650B3, Z 650B4, Z 650C1, Z 650C2, Z 650C3, Z 650C4, Z 650F1
• Royal Enfield: Bullet 500, Bullet 500 Classic, Bullet 500Efi, Bullet 500 Electra, Bullet 500 Standard, Classic 500, Classic 500Efi, Electra 500 DLX G5 Drum, Electra 500 E5 Drum
• Yamaha: RD 350LC, RD 500LC, SR 500 Classic, XS 400 DOHC, XS 400SE