Master Links

What Is a Master Link?

A master link — also called a connecting link — is the removable link that joins the two ends of a drive chain, completing the loop that transfers power from your engine's sprocket to the rear wheel. Every non-endless chain requires one, making the master link one of the most critical components in your drivetrain. Without a properly installed, correctly matched master link, even a brand-new premium chain can fail under load.

Master links come in three main styles: clip-type, rivet-type, and screw-type. Clip-type links are the easiest to install and remove, making them popular for off-road and casual applications where chain changes are frequent. Rivet-type links, once staked in place with a chain press tool, create a connection that rivals the strength of the chain's solid links — the preferred choice for high-performance street and racing applications. Screw-type links, pioneered by EK Chain, use threaded fasteners to achieve a rivet-like fit without requiring a specialized pressing tool, making them an increasingly popular option for garage mechanics.

Choosing the Right Master Link

Matching your master link to your chain is non-negotiable. Pitch (the distance between link pins) must match exactly — common pitches include 420, 428, 520, 525, and 530. Beyond pitch, master links are often engineered specifically for their parent chain series, as inner width and side plate thickness can vary between manufacturers and even between product lines from the same brand. Using a mismatched master link can compromise the integrity of the connection and create a dangerous situation on the road or trail.

• Match pitch and series: Always verify that the master link is designed for your specific chain model.
• Consider your install tools: Rivet links require a chain press; clip and screw-type links can be installed with basic hand tools.
• Application matters: High-horsepower street bikes and racers should favor rivet links for maximum security.
• Finish and color: Many master links are available in natural, gold, chrome, or black finishes to match your chain's aesthetics.

Top Master Link Brands

EK Chain is a Japan-based manufacturer with a long history of chain innovation. EK's patented screw-type master links deliver a rivet-like fit using only an 8mm wrench and a pair of pliers, eliminating the need for a specialized chain press tool while maintaining the secure, permanent-style connection demanded by street riders.

RK Chain is a trusted name in the powersports world, supplying master links across their full lineup of O-ring, X-ring, and XW-ring sealed chain series. RK's master links are available in clip and rivet styles across a wide range of pitches and finishes, and their sealed street chains back the connecting link system with a 20,000-mile warranty.

BikeMaster rounds out the selection with value-focused master links designed to give everyday riders a reliable, properly spec'd connection for routine chain maintenance — a solid choice for budget-conscious riders who don't want to compromise on safety.