RK Racing Chain GB520SO-130 Gold O-Ring Chain - Durable Power Transfer

In this review the RK Racing Chain GB520SO-130 is assessed as a practical, value-oriented chain for riders who want dependable power transfer without premium race-level cost. The bottom line: this 520SO O-ring chain is best for low to mid-range motorcycles and ATVs up to about 400cc because it combines a traditional round O-ring design with Nitrite Butadiene seals to preserve lubrication and deliver smooth drivetrain performance with minimal seal drag.

Key Features

• O-ring construction: Nitrite Butadiene seals trap lubricant effectively so the chain stays greased longer and resists wear in everyday riding conditions.
• 520 size: A compact but robust width and strength profile suitable for many street and off-road machines under 400cc for balanced use.
• Tensile strength: A 6,900 lb tensile rating provides predictable durability for typical commuter, dual-sport, and light performance use.
• Included master link: The clip-type connecting link lets most home mechanics install or replace the chain without needing special press tools.
• Weight and handling: At about 3.39 lbs per 100 links the chain maintains reasonable rotational mass so it does not overly burden smaller engines.

Who It's For

The GB520SO-130 is aimed at owners of low to mid-range CC motorcycles and ATVs who need a reliable sealed chain for both street and light off-road use; it is especially well suited to machines that came from the factory with sealed chains. Riders seeking straightforward longevity and good value will appreciate the combination of a traditional round link, O-ring lubrication sealing, and a moderate tensile rating.

Those who should look elsewhere include riders of high-displacement bikes or machines producing more than about 60 HP, and racers seeking the lightest, highest-performance competition chains - this product is built for durability and value rather than maximum race output.

Pros & Cons

Pros

• Durable construction and effective O-ring seals help maintain lubrication and reduce wear over time.
• Good value for the price with a 6,900 lb tensile rating that suits common street and off-road needs under 400cc.
• Includes a clip-type master link so many riders can complete installation at home.

Cons

• Fit and ease of installation are mixed in user reports, so some bikes may require careful matching or professional help.
• Not intended for high-horsepower or dedicated racing applications above 60 HP.

Specifications

Chain type	520 O-ring
Material (seal)	Nitrite Butadiene O-ring
Tensile strength	6,900 lbs
Max CC rating	400cc street / 400cc off-road
Max horsepower	60 HP
Weight	3.39 lbs per 100 links
Master link	Clip type included

Our Verdict

The GB520SO-130 is a sensible, cost-effective sealed chain for riders of low to mid-range motorcycles and ATVs who value longevity and steady performance. It offers solid durability, easy field service in most cases, and good protection from wear thanks to Nitrite Butadiene O-rings, making it a practical buy for everyday street and mixed off-road riders on machines up to 400cc.

Frequently Asked Questions

Can this chain be used off-road?
Yes, the 520SO is rated for off-road use up to 400cc and is suitable for mixed street and light off-road riding.

Is the master link included and easy to install?
The chain ships with a clip-type master link; many users install it themselves but some report mixed ease of fit depending on bike model.

Will this handle high-horsepower bikes?
No, the chain is designed for up to about 60 HP and is not intended for high-displacement, high-horsepower racing applications.