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 151 models (yearly).

• Aprilia: RS 125 R Replica
• Ducati: Monster 620ie, Monster 620 ie DD, Monster 620 ie MD, Monster 696ABS, Paso 906 Sport
• Honda: CA250 TF, CA250 TG, CA250 TH, CA250 TJ, CA250 TK, CA250 TL, CBR300 RAF, CBR300 RAG, CBR300 RAH, CBR300 RAJ, CBR300 RF, CBR300 RG, CBR300 RH, CBR300 RJ, NSR250 R, NSR250 RG, NSR250 RK, NSR250 RL, NX650 J, NX650 K, NX650 L, XR400 R
• Kawasaki: KLE 500A1, KLE 500A2, KLE 500A3, KLE 500A4, KLE 500A5, KLE 500A6, KR1S 250C1, KR1S 250C2, KR1S 250C3, ZR 400D, ZX6RR 600K1, ZX6RR 600K2, ZXR 400R, ZZR 250H1, ZZR 250H10, ZZR 250H11, ZZR 250H12, ZZR 250H13, ZZR 250H14, ZZR 250H15, ZZR 250H16, ZZR 250H2, ZZR 250H3, ZZR 250H4, ZZR 250H5, ZZR 250H6, ZZR 250 H6-F, ZZR 250H7, ZZR 250 H7-F, ZZR 250H8, ZZR 250H9
• KTM: Duke II 640
• Suzuki: DR 350 SE-T, DR 350 SE-V, DR 350 SE-W, DR 350 SE-X, DR 350SL, DR 350SM, DR 350SN, DR 350SP, DR 600S, DR 600SF, DR 600SG, DR 600SH
• Yamaha: RZ 2504L3, RZ 250R, RZ 250W, TDR 2503CL, WR 250F, WR 250RA, WR 250RB, WR 250RD, WR 250RE, WR 250RF, WR 250RG, WR 250RH, WR 250RJ, WR 250RY, WR 250RZ, WR 250XA, WR 250XD, WR 250XE, WR 250XF, WR 250XG, WR 250XH, WR 250XJ, WR 250XK, WR 250XY