The RK Excel GB520MXU-120 MXU Gold Drive Chain is a high-performance 520-pitch chain designed for off-road motorcycles up to 500cc and applications producing up to 70 horsepower. Its ultra-thin UW-ring seals are ideal for motorcycles with narrow chain clearance while providing significantly longer service life than a comparable non-sealed chain.
RK Excel’s UW-Ring sealing system combines triple-barrier grease protection with anti-debris technology to help prevent contamination and reduce friction between internal chain components. The seal’s smaller contact points also help minimize drag during cold starts. With a UW-ring thickness approximately 50% thinner than a conventional O-ring, the GB520MXU-120 delivers a balance of clearance, durability, and efficient operation for demanding riding conditions.
Fitment: Designed for 520-pitch motorcycle drivetrain applications, including off-road motorcycles rated up to 500cc and 70 horsepower. Verify the required chain length, sprocket compatibility, and manufacturer fitment specifications before installation. This chain includes a clip-style master link for serviceable installation.
The RK Excel GB520MXU-120 is manufactured by RK Excel and is also identified by manufacturer part number GB520MXU-120 and vendor part number GB520MXU-120. Its gold finish provides a distinctive appearance while the sealed construction helps support long-term performance in dusty, abrasive, and demanding riding environments.
Features:
- Size: 520 pitch with 120 links
- Model: MXU
- Brand: RK Excel
- Manufacturer Part Number: GB520MXU-120
- Vendor Part Number: GB520MXU-120
- Seal Type: Ultra-thin UW-Ring seals with triple-barrier grease protection
- Anti-Debris Protection: Helps reduce contamination and internal component friction
- Tensile Strength: 8,000 pounds
- Maximum Application Rating: 500cc off-road motorcycles
- Maximum Horsepower Rating: 70 horsepower
- Master Link: Clip type included
- Finish: Gold