In working on a pal's R75/6, one of the needed repairs was the positive battery terminal cable replacement. The cable showed signs of having been re-terminated at some point in the distant past, so the cable was now too short for the new battery. As one might expect, there was lots of terminal corrosion at the battery end.

When I got the cable off at the starter end, to my great surprise, the corrosion for the battery acid had wicked up the entire length of the cable and was puking out onto the starter terminal !!! This cable is nearly 28 inches long ! Since this one cable supplies all the positive termination between the battery and electrical system, if the connectivity goes out, then the entire electrical system will go down. Although you could jumper this out on a /6 and kick start, the task becomes much harder on a /7.

I have never seen anything like this in all my years of car and motorcycle maintenance. Additionally, being the preventative maintenance type, it means my bike has to get the same treatment, or at least a closer inspection

So, besides reporting this unseen time bomb to the group, my question is do others generally build their own cables or simply use the BMW replacement part ?