bikerjulio wrote:This is what KMC have in their Q&A
The Missing Link on chain models X11SL and X11L can not be reused. All other Missing Links can be reused between 2-3 times per life cycle of the chain. If you purchase a replacement chain, the used Missing Link should not be reused and is not interchangeable. Missing Links offer riders ease of maintenance and quick chain replacement when there is an emergency on the road or trail.
So @gabe is only correct when referring to the 11-speed connectors, and even then I've certainly had them off and on a few times with no ill effects.
They say it is should not be reused. But while I am changing my frame, I wanted to try if the missing link is strong enough to be used second time.
It is.
Its been around 1500km and it is still working.
I am carrying an extra missing link in my jersey pocket all the time, just in case, but I can say that there is no problems so far.
I definitely will not use the same link one more time, since I can actually see that it is weaker now while locking it, but using the same link second time should not be a problem I guess.