There's no ******* contest. You made a statement which is often put forward as cast-iron fact and two of us disagreed - with qualification. There are plenty of examples of commonly-held beliefs that simply aren't strictly true and this is one of them.
yes totally.Rule of thumb is less than 1/3. Doesn't work with O ring chains and is old hat. Best way is to measure pin to pin in different places along the chain as areas will stretch more or less than others for some reason.
3rd for split links. A mate uses them on his F2 outfit with no problems
I have never had a split link come off, although I saw a awful lot fitted the wrong way when I worked in a MOT bay. I also saw people levering them off with screwdrivers and hammers etc and distorting the clip itself, then refitting the twisted clip and expected it to stay on, instead of clipping it forward and back iwth a pair of blunt nosed pliers.
Probably after reading the internet, the same people are now rivetting their own softlinks badly and having them come off instead or riding round with tight spots in the chain.
Edited to add that to the poster that used a non o ring link on a o ring chain, you can get o ring split links to suit. I have a gold DID one on my X ring on my gpz1100 when I converted it to 530 pitch from 630 (relax safety nazi's, the tensile strength of a modern 530 is far stronger than the 630 it came with from the factory), that came with it in a little DID marked bag. They have slightly longer pins to accomodate the extra width required for the O rings, and some O rings in the pack with them. It does rely on having a clueful supplier however as a couple of box shifters trotted out the "you can't buy 530 split links" line to me too.
We actually rely on chains being the weakest link on some of our conveyors!. they used to have clutches fitted, but a burnt out clutch took 30+ minutes to change whereas we can replace a broken chain in less than 5 minutes.