Trevor, I completely agree, most of us know the weak points of our "ladies" and can check things before they break.
Still, over all the years I had quite some roadside repairs. But with a bunch of friends we always managed to get the bikes running again. And what's better than telling these stories later while having a couple of beers https://ibb.co/cNGVnJc
Had my share of DNF's but very few were really unexpected usually due to a bad habbit of leaving things too late then doing rush repairs without sufficient time to test said repairs or just plain not properly preparring the bike before I left .
I often feel that the biggest problem is the riders who have forgotten what these bikes were like from new and expect 2020 performance from their bikes and do not have the skills to compensate for the short commings of their mount .
They are noisy, shake, bits break , fall off & fluids leak out everywhere but most times they will get you home .
Remember BSA regularly tried to win Maudes trophies by building bikes up from spare parts the riding them for long distances .
I have seen a lot of bikes retire from runs that I would have had no problems riding back home.
These bikes are a lot tougher than most appreciate and they can often be fixed with junk found on the side of the road.
We had a member who broke the fuel banjo en route to a rally 600 km away.
Did he give up & go home
No way, a golf T found on the side of the road and some epoxy & he was back on the way .
Way to easy to call it quits & then wait for the back up or call the other half to bring the trailer to rescue you .