Dirt Bike Chain Sizing

There are predominantly 3 sizes of chains for all dirt bikes no matter what age or size the bike is. A ‘520’ chain will fit most full sized dirt bikes on the market. From a 125 through to a big bore KTM 525 they all predominantly share this size. Smaller bikes such as 85cc MX bikes will run a ‘428’ and only 50cc MX bikes will go as low as a ‘420’.

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