{"product_id":"rk-racing-chain-m520hd-120-520-series-motorcycle-chain-120-link-heavy-duty-pre-stressed-clip-master-link","title":"RK Racing Chain M520HD-120 520-Series Motorcycle Chain — 120-Link Heavy-Duty Pre-Stressed, Clip Master Link","description":"\u003cp\u003e\u003cstrong\u003eRK Racing Chain M520HD-120 is a heavy-duty 520-series motorcycle chain—120 links long—designed for durable, pre-stressed performance on bikes up to about 400cc.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt in Malaysia from Japanese steel and engineered to Japanese specifications, the RKM line combines two-point riveted pins and curled bushings for a robust ride-ready chain. This model is pre-stressed and pre-stretched at the factory to minimize initial elongation and reduce the need for frequent early adjustments, delivering a consistent fit and smoother power transfer compared with many competing heavy-duty chains.\u003c\/p\u003e\n\n\u003ch3\u003eHow strong is the M520HD-120 for spirited riding?\u003c\/h3\u003e\n\u003cp\u003eThe M520HD-120 has a high tensile strength and reinforced pin construction to withstand demanding use without sacrificing flexibility. It’s engineered to absorb torque precisely while resisting excessive stretch under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated maximum tensile strength: 7,700 lbs (pounds\/feet)\u003c\/li\u003e\n  \u003cli\u003eTwo-point riveted pins for secure link retention\u003c\/li\u003e\n  \u003cli\u003eCurl-style bushings increase contact stability and wear resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this chain fit my bike and how is length handled?\u003c\/h3\u003e\n\u003cp\u003eThis 520-series chain follows standard 15.875 mm pin-to-pin center spacing and includes 120 links—suitable for many street and off-road applications up to roughly 400cc. It ships with a clip-type master link for easy installation and adjustment to the correct length for your sprockets.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChain pitch \/ pin spacing: 15.875 mm\u003c\/li\u003e\n  \u003cli\u003e120 links supplied; trim to required length using the clip master link\u003c\/li\u003e\n  \u003cli\u003eApprox. 19.2 links per foot for quick length calculations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance advantages does this pre-stressed chain offer?\u003c\/h3\u003e\n\u003cp\u003ePre-stressing and pre-stretching reduce the initial run-in period, so the chain reaches stable length sooner and requires fewer early adjustments. That saves time at the bench and helps maintain consistent chain tension and alignment for improved driveline behavior.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower initial elongation means fewer early tighten-ups\u003c\/li\u003e\n  \u003cli\u003eConsistent tension reduces sprocket wear over time\u003c\/li\u003e\n  \u003cli\u003eFactory treatment helps preserve geometry under load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the physical and handling characteristics I should expect?\u003c\/h3\u003e\n\u003cp\u003eRK designed the M520HD-120 to balance durability and manageable weight so it won’t unduly add rotational mass while providing heavy-duty performance. The chain weight and construction are tuned for daily street use and light to moderate off-road riding.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWeight: approximately 3.65 lbs per 100 links (proportionally for 120 links)\u003c\/li\u003e\n  \u003cli\u003eClip-style master link included for installation convenience\u003c\/li\u003e\n  \u003cli\u003eSuitable for bikes up to ~400cc for street\/off-road use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this chain for? The RK Racing Chain M520HD-120 is aimed at riders who want a rugged, ready-to-install 520-series chain that performs reliably with minimal break-in. It’s a solid choice for commuters, weekend sport riders, and light off-road enthusiasts using motorcycles in the sub-400cc class who expect a durable link set built to Japanese specifications and manufactured with Japanese steel. If you need a heavy-duty chain that reduces early maintenance and stays true under load, this model is engineered to meet those practical needs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the M520HD-120 include a master link?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It ships with a clip-style master link for easy installation and length adjustment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What motorcycles is this chain suitable for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for street and light off-road bikes up to about 400cc; verify sprocket compatibility before fitting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RK Racing Chain","offers":[{"title":"Default Title","offer_id":48083962232990,"sku":"B00BV6VYV6","price":88.37,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/rk-racing-chain-m520hd-120-front-packaging.jpg?v=1785841349","url":"https:\/\/northtrailauto.ca\/products\/rk-racing-chain-m520hd-120-520-series-motorcycle-chain-120-link-heavy-duty-pre-stressed-clip-master-link","provider":"North Trail Auto","version":"1.0","type":"link"}