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Drivetrain› Belt and Chain Drive

RK Racing

RK Chain 520SO-120L O-Ring - Natural

$97.58 $87.82 Save $9.76

SKU: R05K 520SO-120

In Stock
In Stock
Ships by Sep 30
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RK Racing 520SO O-Ring Chain is an affordable drive chain designed for low- to mid-range CC motorcycles with factory-sealed chains. It features a traditional round O-ring design and is constructed from Nitrite Butadiene to seal in lubrication and minimize drag. This chain is recommended for applications up to 400cc for both street and off-road use.

The chain offers a tensile strength of 6,900 lbs and a maximum horsepower rating of 60 HP. It includes a clip-type master link for easy installation. The SO series provides a blend of performance and affordability, making it a popular choice for riders seeking a reliable drive chain.
Show original supplier description

Part #: 520SO-120

Traditional round O-ring chain that's a convenient blend of performance and affordability. RK's 520SO Chains are suitable for low- to mid-range cc motorcycles that came from the factory with sealed chains.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandRK Racing
Part NumberR05K 520SO-120
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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