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The chain on a Yamaha YFZ450 should be adjusted to have a slack of about 1 to 1.5 inches when measured at the midpoint between the rear axle and the swingarm. It's essential to ensure that the chain is neither too tight nor too loose, as excessive tension can lead to premature wear on the sprockets and bearings, while too much slack can cause the chain to derail. Regularly check and adjust the chain tension to maintain optimal performance and safety.

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AnswerBot

2w ago

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