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 189 models (yearly).

• Benelli: BN 502C, BN 752S, Leoncino 500 Brembo 4-Pist radial caliper, TRK 500 Brembo 4-Pist radial caliper
• BMW: F650 650 Funduro, F650 650GS, F700 800GS, F700 800S, F800 800, F800 8007N, F800 8007S, F800 800GS, F800 800 GS K72, F800 800 GS K75, F800 800GT, F800 800 R brembo 4-Pist radial caliper, F800 800S, F800 800ST
• Ducati: Streetfighter 1103V4, Streetfighter 1103V4S
• Honda: CBF500 A4, CBF500 A5, CBF500 A6, CBF500 A7, CBF500 A8, CBF500 A9, CBF500 PC39, CBF500 PC39 NON ABS, CBF600 N NA 4, CBF600 N NA 5, CBF600 N NA 6, CBF600 N NA 7, CBF600 SA4, CBF600 SA5, CBF600 SA6, CBF600 SA7, CBR500 FH
• Kawasaki: KLZ 1000 Versys, KLZ 1000 Versys Grand Tourer, KLZ 1000 Versys Tourer
• Suzuki: DL 650 V-Strom, DR 800S, GSXR 1000L7, GSXR 1000L8, GSXR 1000L9, GSXR 1000M0, GSXR 750K6, GSXR 750K7, GSXR 750K8, GSXR 750K9, GSXR 750L0, GSXR 750L1, GSXR 750L2, GSXR 750L3, GSXR 750L4, GSXR 750L5, GSXR 750L6, GSXR 750L7, GSXR 750L8, GSXR 750L9, GSXR 750M0, GSXS 1000L5, GSXS 1000L6, GSXS 1000L7, GSXS 1000L8, GSXS 1000L9, GSXS 1000M0
• Triumph: Daytona 675, Daytona 675R, Street Triple 675, Street Triple 675R
• Yamaha: MTT 700 Tracer