{"id":3517,"date":"2026-04-02T06:50:17","date_gmt":"2026-04-02T06:50:17","guid":{"rendered":"https:\/\/motorcyclechain.top\/?post_type=product&p=3517"},"modified":"2026-04-02T06:51:54","modified_gmt":"2026-04-02T06:51:54","slug":"motocross-motorcycle-chain-428-520-series","status":"publish","type":"product","link":"https:\/\/motorcyclechain.top\/zh\/product\/motocross-motorcycle-chain-428-520-series\/","title":{"rendered":"\u8d8a\u91ce\u6469\u6258\u8f66\u94fe\u6761 \u2014 428 \/ 520 \u7cfb\u5217"},"content":{"rendered":"
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\u4ea7\u54c1\u6982\u8ff0<\/h2>\n

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\u4e00\u4e2a motocross motorcycle chain<\/strong> is a specialised type of roller drive chain designed to withstand the mechanical demands of off-road riding. Compared with a standard street chain, a motocross chain is built with solid bushings rather than curled bushings, heavier-gauge side plates, and larger-diameter pins \u2014 all of which contribute to higher tensile strength, greater resistance to the shock loads generated by jumps and hard acceleration on loose or uneven surfaces, and longer wear life under conditions where grit and abrasive particles would rapidly degrade a lighter chain.<\/p>\n

\"motocross<\/p>\n

Motocross chains<\/strong> are available in two main configurations: non-sealed and sealed. Non-sealed chains \u2014 such as the 428PLUS, 520PLUS, and 520K in our range \u2014 are the choice for competitive racing where the chain is cleaned and replaced frequently, and where the weight advantage of a non-sealed design is valued. Sealed chains, which incorporate O-ring or X-ring seals at each pin-bushing joint, are better suited to enduro, trail, and recreational off-road riding where maintenance intervals are longer and the chain must resist immersion in mud and water over extended use.<\/p>\n<\/div>\n

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Motocross Motorcycle Chain Size Chart<\/h2>\n
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The table covers five motocross-specific chain specifications. All use solid-bore bushings machined from alloy steel rather than the curled bushings found in standard-series chains \u2014 solid bushing construction provides greater radial stiffness and resists deformation under the sustained impact loads that characterise motocross riding. Tensile strength figures are tested break loads; apply an appropriate safety factor for calculated working loads based on application and power output.<\/p>\n<\/div>\n

\n\n\n\n\n\n\n\n\n\n
\u94fe\u53f7<\/th>\n\u87ba\u8ddd\uff08\u6beb\u7c73\uff09<\/th>\n\u704c\u6728\u578b<\/th>\n\u5bbd\u5ea6\uff08\u6beb\u7c73\uff09<\/th>\n\u9500\u9489\u76f4\u5f84\uff08\u6beb\u7c73\uff09<\/th>\n\u5f15\u811a\u957f\u5ea6\uff08\u6beb\u7c73\uff09<\/th>\n\u6eda\u8f6e\u76f4\u5f84\uff08\u6beb\u7c73\uff09<\/th>\n\u677f T \u5185\u5f84\uff08\u6beb\u7c73\uff09<\/th>\n\u677f T \u5916\u5f84\uff08\u6beb\u7c73\uff09<\/th>\n\u6297\u62c9\u5f3a\u5ea6\uff08kN\uff09<\/th>\n\u91cd\u91cf\uff08\u516c\u65a4\/\u7c73\uff09<\/th>\n<\/tr>\n<\/thead>\n
428PLUS<\/td>\n12.700<\/td>\n\u575a\u786c\u7684<\/td>\n7.85<\/td>\n4.45<\/td>\n17.30<\/td>\n8.51<\/td>\n1.56<\/td>\n1.56<\/td>\n17.5<\/td>\n0.68<\/td>\n<\/tr>\n
428HPLUS<\/td>\n12.700<\/td>\n\u575a\u786c\u7684<\/td>\n7.85<\/td>\n4.45<\/td>\n19.05<\/td>\n8.51<\/td>\n1.96<\/td>\n1.96<\/td>\n20.6<\/td>\n0.85<\/td>\n<\/tr>\n
520PLUS<\/td>\n15.875<\/td>\n\u575a\u786c\u7684<\/td>\n6.35<\/td>\n5.24<\/td>\n18.00<\/td>\n10.16<\/td>\n2.03<\/td>\n2.03<\/td>\n28.0<\/td>\n0.96<\/td>\n<\/tr>\n
520MX<\/td>\n15.875<\/td>\n\u575a\u786c\u7684<\/td>\n6.35<\/td>\n5.24<\/td>\n18.20<\/td>\n10.16<\/td>\n2.20<\/td>\n2.20<\/td>\n36.0<\/td>\n0.91<\/td>\n<\/tr>\n
520K<\/td>\n15.875<\/td>\n\u575a\u786c\u7684<\/td>\n6.35<\/td>\n5.08<\/td>\n17.60<\/td>\n10.16<\/td>\n1.96<\/td>\n1.96<\/td>\n26.5<\/td>\n0.91<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Benefits of the Motocross Motorcycle Chain<\/h2>\n
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Motocross chains are designed to handle the harsh conditions of off-road riding. They incorporate features that reduce wear and tear in conditions where a standard street chain would deteriorate quickly. Specific benefits compared with standard non-motocross chains include:<\/p>\n

\"motocross<\/p>\n<\/div>\n

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\u2b50<\/span>
\nStrength and durability under shock load:<\/strong> Motocross chains are built for the high power output and torque of off-road machines, plus the impact forces from jumps and rough terrain. Solid bushings and heavier plates resist deformation where a curled-bushing chain would compress and elongate rapidly.<\/p>\n<\/div>\n

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\u2b50<\/span>
\nWear resistance:<\/strong> The solid bushing in contact with the hardened pin wears at a controlled, slow rate. Some motocross chains also incorporate O-ring or X-ring seals to keep lubricant inside the joint and contaminants out, extending service life considerably versus non-sealed variants under identical conditions.<\/p>\n<\/div>\n

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\u2b50<\/span>
\nEfficient power transfer:<\/strong> Motocross chains are designed to transmit power from the engine to the rear wheel with minimal energy loss through flexion or friction. This directly affects acceleration and throttle response \u2014 measurable in competitive riding where fractions of a second count.<\/p>\n<\/div>\n

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\u2b50<\/span>
\nWeight-optimised construction:<\/strong> Some motocross chains, including the 520MX at 0.91 kg\/m, achieve high tensile strength (36.0 kN) without excessive mass. Reduced unsprung rotating weight has a tangible effect on handling and rear suspension response in off-road applications.<\/p>\n<\/div>\n<\/div>\n

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How to Tighten a Motocross Motorcycle Chain<\/h2>\n
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Maintaining correct chain tension on a motocross motorcycle is especially important because off-road riding subjects the drivetrain to more extreme chain excursions than street riding \u2014 a chain that is too tight will bind under full rear suspension compression, potentially breaking the chain or damaging the swingarm. A chain that is too loose risks derailing from the sprocket. Check tension before every ride during an active riding season.<\/p>\n<\/div>\n

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  1. 1<\/span>
    \nPark the motorcycle on a centre stand or paddock stand.<\/strong> The rear wheel should be off the ground so it can rotate freely. Ensure the engine is off and transmission in neutral.<\/li>\n
  2. 2<\/span>
    \nLoosen the rear axle nut.<\/strong> Use a wrench or socket to loosen the nut sufficiently to allow wheel movement, but do not remove it.<\/li>\n
  3. 3<\/span>
    \nLoosen the chain adjusters<\/strong> on both sides of the swingarm. Turn counterclockwise to move the wheel forward and increase chain slack, clockwise to move it back and reduce slack.<\/li>\n
  4. 4<\/span>
    \nMeasure chain slack at the midpoint<\/strong> between the front and rear sprockets along the lower run. For most motocross and off-road bikes, correct slack is 35\u201345 mm of vertical movement. Consult your owner’s manual for the model-specific specification \u2014 motocross bikes require more slack than street bikes to accommodate full suspension compression.<\/li>\n
  5. 5<\/span>
    \nAdjust both sides equally.<\/strong> Verify that the alignment marks on the swingarm adjuster match on both sides. Unequal adjustment causes the rear wheel to run at an angle, accelerating tyre wear and causing handling problems.<\/li>\n
  6. 6<\/span>
    \nTighten the adjuster lock nuts<\/strong> evenly on both sides once the correct slack is achieved.<\/li>\n
  7. 7<\/span>
    \nTorque the rear axle nut<\/strong> to the specification in your service manual. Check wheel alignment using the swingarm reference marks and verify the rear brake caliper is correctly repositioned if it was disturbed.<\/li>\n<\/ol>\n

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    \"motorcycle<\/p>\n

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    Motocross Motorcycle Chain \u2014 Material and Construction<\/h2>\n
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    The construction differences between a motocross chain and a standard street chain are not visible in the series number alone. Understanding what distinguishes the PLUS and MX designations from a standard-series chain helps in selecting the right specification for an application.<\/p>\n

    \"\u8d8a\u91ce\u6469\u6258\u8f66\u94fe\u6761<\/p>\n<\/div>\n

    Solid Bush vs Curled Bush<\/h3>\n