As you have found the elastic standard chain is just that. As well as being crap. Why BMW use these things is beyond me, and before anyone says “they’re cheap” we know that already and the difference in cost to buy something else would surely be made up in good will. However, anything else is going to be an improvement be it RK, Regina, DID, or whatever. Sometimes BMW can be really cheap, and the stock chain on the 800 series is very cheap.