The three-digit number on every chain’s outer plate encodes pitch and width. Both must match your sprockets exactly — one wrong digit means the chain won’t work. This guide decodes the numbering system and shows which size fits which machine.
摩托车链条尺寸 每条链条的外链板上都印有一个三位数字代码,用于编码链条规格。该代码并非随意设定——前一位或两位数字代表节距(相邻链销之间的距离),后两位数字代表内宽系列。根据日本和韩国摩托车链条尺寸标准 JIS B 1801,这两个数值完全定义了链轮的兼容性要求。
Decoding “428” and “520” — the two most common pitches
注意:宽度代码仅为标识符,不能直接转换为毫米。请务必参考已发布的 JIS B 1801 规范表进行核对。
The suffix letters after the base code identify the chain variant: no suffix = standard non-sealed; H = reinforced heavier plates; O = O-ring sealed; X = X-ring sealed; SX = Super X-ring sealed. So “525H-SX” is a 15.875 mm pitch, 7.94 mm inner width, H-grade reinforced Super X-ring sealed chain.
The width code is not a decimal measurement. “20” does not mean 2.0 mm — it identifies the 6.35 mm inner width family of the 520 series. Always use the published specification table rather than deriving measurements from the code number.
两种节距系列涵盖所有五种尺寸:12.700 毫米(1/2 英寸)系列适用于小型机器,15.875 毫米(5/8 英寸)系列适用于中型和大型机器。在每个节距系列内,内宽会根据不同发动机级别的扭矩容量和链轮几何形状要求而有所不同。
The 420’s 6.35 mm inner width makes it the narrowest of the 12.70 mm pitch family. At 0.57 kg/m, a 100-link 420 chain weighs approximately 570 g — for a 65–80 kg scooter, this chain weight relative to the machine’s total mass is more significant than it would be on a 200 kg touring bike. Fitting a 428 where a 420 is specified would add 140 g of rotating mass for no measurable strength benefit at 50–125cc power levels.
428 是全球售后市场销量最大的单链规格。它与 420 共享节距,但增加了内宽(7.85 毫米对比 6.35 毫米)和滚子直径(8.51 毫米对比 7.77 毫米),从而增大了齿面接触面积。标准型 428 的扭矩为 17.8 kN,适用于大多数 125-250cc 发动机;而 428H 的扭矩为 20.6 kN,无需更换链轮即可应对更高功率输出的发动机。由于其在排量最大的车型类别中广泛适用于越野摩托车、公路摩托车、踏板车、双用途摩托车和巡航车,因此替换零件供应充足。
520 型链轮采用 15.875 毫米节距——更长的节距意味着链轮齿处滚子接触半径更大,从而将载荷分散到更大的弧度上。其 6.35 毫米的内宽(尽管节距更长,但与 420 型链轮相同)使其成为三款 5/8 英寸链轮中最窄、最轻的,重量仅为 0.91 公斤/米。对于注重降低旋转质量的运动型摩托车而言,520 型链轮是理想之选:520H-X 型链轮的扭矩为 34.0 千牛,在提供密封性能的同时,重量与标准 530 型链轮相当。
The 525’s 7.94 mm inner width is 1.59 mm wider than the 520 and 1.59 mm narrower than the 530. That wider roller provides more tooth-face contact area than the 520 — distributing load across a broader band of the sprocket tooth at a given chain tension. The trade-off versus the 520 is modest: 0.98 vs 0.91 kg/m, a difference of 70 g per metre. The 525 is typical OEM specification for adventure bikes, parallel-twin naked bikes, and sport tourers in the 650–750cc class.
The 530’s 9.53 mm inner width makes the broadest tooth-face contact of the three 15.875 mm variants. At 1.09 kg/m for the standard, it is the heaviest — but on a 250 kg touring machine this is not a meaningful consideration. The strength advantage of the 530 family appears clearly in the SX-grade: the 530-SX at 43.0 kN is the highest tensile strength in the Korea Ever-Power range. For a fully-loaded touring motorcycle where combined mass exceeds 450 kg, the 530-SX’s structural margin over the working load is both technically sound and practically reassuring.
| 尺寸 | 螺距(毫米) | 内宽(毫米) | 滚轮直径(毫米) | 标准拉伸 | 顶级SX拉伸 | 重量(公斤/米) | 发动机级 |
|---|---|---|---|---|---|---|---|
| 420 | 12.700 | 6.35 | 7.77 | 15.6 kN | — | 0.57 | 50-125cc踏板摩托车、迷你摩托车 |
| 428 | 12.700 | 7.85 | 8.51 | 17.8 kN | 28.0 kN (SX) | 0.71 | 125–250cc 街车、越野车、耐力赛车 |
| 520 | 15.875 | 6.35 | 10.14 | 26.5千牛 | 36.0 kN (SX3) | 0.91 | 250–600cc 运动型摩托车、街车、越野摩托车 |
| 525 | 15.875 | 7.94 | 10.14 | 26.5千牛 | 40.0 kN (525-SX) | 0.98 | 400–750cc 探险摩托车,裸露式双缸摩托车 |
| 530 | 15.875 | 9.53 | 10.14 | 26.5千牛 | 43.0 kN (530-SX) | 1.09 | 600cc以上旅行车、巡航车、大型街车 |
链轮齿距由节距决定——12.70毫米节距的链条(420、428)无法与15.875毫米节距的链轮正确啮合,反之亦然。在同一节距系列中,内宽也必须与链轮齿距相匹配。520滚子(宽6.35毫米)无法正确安装在为530滚子(宽9.53毫米)设计的链轮齿槽中——较窄的滚子位于齿面之间而不是紧贴齿面,导致立即出现异常磨损。
What you can always change freely within the same base size number: the chain variant suffix. Standard → H-grade → O-ring → X-ring → Super X-ring — all in the same base size (e.g. all “520” variants) — fit the same sprockets. The variant suffix changes the sealing system and plate gauge, not the pitch or inner width that determines sprocket compatibility. Upgrade at any chain replacement without touching the sprockets.
420 至 530 五种尺寸均在专用生产线上生产,在发货前,其节距、内宽、辊径和板高均按照 JIS B 1801 参考量规进行验证。
韩国永力摩托车链条有限公司——拥有五家生产工厂,并通过了ISO 9001认证
可订购单件或批发。库存尺码将在 3-7 个工作日内发货。不同尺码的订单将合并在一个包裹中发货。
韩国Ever-Power公司备有420至530五种节距的链条,包括标准型、H级、O型环、X型环和超级X型环。请提供您的链条编号或摩托车型号,我们将免费为您确认正确的规格。
每个尺寸和规格的完整尺寸数据均可在各个产品页面上找到。
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