The RK Excel 520SO-120 drive chain is a traditional round O-ring chain designed for low- to mid-range motorcycles and all-terrain vehicles. Its 520 size and 120-link configuration provide dependable fitment for vehicles originally equipped with sealed chains. Suitable for both street and off-road use, this chain supports applications up to 400cc and up to 60 horsepower.
The RK Excel 520SO uses nitrile butadiene rubber O-rings to help retain internal lubrication while limiting seal drag and power loss. This construction promotes smooth power transfer, consistent operation, and reliable service in everyday riding conditions. The chain is supplied in a natural steel finish and includes a clip-style master link for installation.
Designed for motorcycles, ATVs, and similar powersports applications, the RK Excel 520SO-120 offers a practical balance of performance and affordability. Verify the vehicle manufacturer’s original chain size, link count, and sealed-chain specification before installation. The chain is rated for street and off-road/ATV use up to 400cc.
Features:
- Size: 520 x 120 links
- Model: 520SO
- Brand: RK Excel
- Manufacturer Part Number: 520SO-120
- Vendor Part Number: 520SO-120
- Chain Type: Round O-ring drive chain
- Fitment: Low- to mid-range motorcycles and ATVs originally equipped with sealed chains
- Application: Street and off-road/ATV use up to 400cc
- Maximum Horsepower: 60 HP
- Tensile Strength: 6,900 pounds
- Master Link: Clip type included
- Finish: Natural steel
- Chain Width: Maximum 0.85 inches
- Weight: 3.39 pounds