Andrew, in the UK these robustly built motorcycles had rotten exhausts and swingarms well before 10 years old if they were ridden in the damn awful winter conditions. But the point I was making is that the parts will stop being made. There's nothing anyone can do about that and it's why if you've got a new and genuine Z1 or CB750 exhaust system in the garage you can probably plan for early retirement.Based on how robust and over-built every part of the ST (both the 11 and the 13) is, I don't get the impression that Honda had a short life-span intended for this design.
It seems like they were built for longevity.
Someone in China may set up production of parts such as brake components but they may not. I have experience of keeping older Japanese bikes on the road and OEM, it's expensive. The 1100 is already extremely difficult to find some parts for and the 13 will be following along soon.
But it's just my opinion.
And I've been wrong before.
Upt.