No need to replace it if it's in good condition.
Set the tension (ok TJ - "slack") correctly at the tightest spot, and then spin the wheel - noting the change in "slack". If the change is significant, further investigation is needed and a replacement chain may be in-order.
If you put a new chain on worn sprockets you can get accelerated chain wear and some odd noises and vibrations, so you are better to replace the chain and sprockets together.
Chances are you will be fine with an adjustment.
Last futzed with by jkv45; June 29th, 2018 at 07:25 AM.
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