CHAINS & 520 Sprocket/Chain Conversions

Motorcycle Chains, Sprockets & 520 Chain Conversion Kits

Your drivetrain is your direct connection between engine power and rear wheel — and worn or incorrectly sized chains and sprockets rob you of both performance and efficiency. HardRacing carries premium motorcycle chains, sprocket sets, and 520 chain conversion kits for sport bikes, mini bikes, and track machines, along with the chain breaker and rivet tools to do the job right.

The most popular performance upgrade in this category is the 520 chain conversion. Most stock sport bikes come with a heavier 525 or 530 chain. Converting to a lighter 520 chain and matching sprockets reduces rotating mass, improves throttle response, and typically saves 500–800 grams of unsprung weight — a genuine performance gain for any riding application.

Chain & Sprocket Options

We stock RK, Regina, DID, and JT brand chains and sprockets in sizes to fit the most popular sport bikes and mini bikes. Chain options include standard non-sealed chains for track-only applications and X-ring or O-ring sealed chains for street use where longer service life matters. Aluminum rear sprockets save additional weight at the cost of longevity; steel options last longer for daily riding.

Complete your drivetrain upgrade with a quality chain breaker and rivet tool — cutting corners on installation can lead to premature chain failure. Browse our full drivetrain catalog to find the right components for your build.