I am in the Philippines at the moment.

I realized your bike is very different, here they are still producing models that are 10 years out of date like the XR200, which is really an XRL.

I have an interest in subframe and so on, as that seems to be one of the first areas to be sacrificed in pursuit of light weight.

My YBR125 has a much more robust subframe than my Husky TE610E, for example.
The YBR gets loaded with passenger, saddlebags, and a 50l bag on the rack. Sometimes it is used in the business to ferry bundles of clothing as well a passenger,, I'd guess 200 lb of stuff and 2 people on top of that. The Husky would break in half...

Further east from where I am, they build 'skylabs' from the business 125 / 150 / 175 cc bikes. Two long plank platforms on either side bolted to the frame, 2 additional shocks added out back, and a roof. I've seen 9 people and their stuff running down a dirt road on one of these...