Just checked my notes from when I did mine. Target was 0.127mm (0.005") with min/max range of 0.102 - 0.152 (0.004" - 0.006"). So yes, definitely worth proceeding with getting the gaps within tolerance. The fun part, you can try playing musical chairs by rearranging what you have to get as many as possible in spec, then just replace the ones you need. There was a guru on here "AMC49" who was a wealth of knowledge on these bikes, sadly I think he stopped contributing due to some kind of issue with another member(s) however many of the useful posts are still here.