This is what Oddjob was referring to earlier in the thread. This is a CB400/4 Hyvo primary chain (same chain as fitted to the CB500/4). The knackered one on the left has about 5000 miles life left in it as you can see by the middle of the chain touching. The one on the right is new.
But...you have to remove it from the engine to assess its knackeredness 😀😀 Once you have removed it to assess, you may as well fit a new one whilst you are there, no point in not changing it and false economy not to either.
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