Technical Overview: RK GB520XSO X‑108 Chain (Gold, RX‑Ring)

Core Specifications

• Series & Size: RK GB520XSO, 520-pitch chain with 108 links, sealed with RX‑Ring (X‑ring) technology.

• Seal Technology: Proprietary RX‑Ring, offering dual-sealing surfaces and superior lubrication retention for up to twice the wear life compared to standard O‑ring chains.

• Tensile Strength: Approximately 8,300 lbs (~37 kN)—high-strength construction suitable for mid-capacity bikes.

• Compatibility Limits:

  • Recommended for motorcycles up to 750 cc

  • Both street and off-road applications

  • Max performance roughly 750 cc / 80 HP

• Construction Features:

  • Uses vacuum-injected U-grease for enduring lubrication

  • Components like pins, bushings, and rollers are heat treated and shot peened for durability and refined motion

• Master Link: Includes both clip and rivet-type master links for flexible installation options

• Warranty: Some versions offer RK’s 20,000-mile warranty 

• Compatible Motorcycles

  While specific fitment listings for the 108-link variant are limited, RK’s similar models align with mid-displacement bikes. Common examples include:

  • Honda: CBR600 series, CB500 variants, VFR800

  • Kawasaki: ZX‑6R, ER‑6n

  • Yamaha: MT‑07, FZ‑6

  • Suzuki: SV650, GSX‑R600

  These models typically utilize 520 chains in the 104–110 link range. The 108-link size fits many with stock sprockets and frame lengths. For bikes that list a 118, 120, or 110 link chain, the 108 is often a minimal difference that's adjustable.