My relatively new 9-speed KMC chain has been broken open twice now on the trail for repairs (serious rear derailleur issues ) because the master links were sticking and could not be removed without the special tool that I did not have with me. Reassembling the chain would require a third master link. My question -- does the chain become unsafe at some point when it has multiple master links? Is there a maximum safe number? Thanks to the experts.
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