Thanks for your input and its quite reasonable to feel the way you do about this. However there’s a reason I don’t quite call it that risky.
Firstly there’s a pin that slots between each riser and the original clip-on which prevents any major play. Without this, the effect of play while riding would be catastrophic for sure. So whoever designed it, may not have been accurate to the decimal place of the mm but was smart nonetheless.
Secondly, vertically, it’s quite a tight fit and they’re no way way I could manually yank the whole thing off when tight. Even with the bolts totally loose, it takes a bit of effort to mount/dismount the risers+clip on.
Tightened, I haven’t experienced issues. The concern is that I can generate a bit of horizontal play when I use significant force. Ideally there should be no play possible once the bolts at tight. So while I wish it was perfect, and while someone else may not, I can live with what it is. Honestly the difference in comfort is significant which just indicates that the GW250’s handlebar ergonomics are not designed well. I reckon that the faired version, GW250F, which has regular handlebars instead of clip ons, would be more comfortable. Meanwhile, I’m wondering if super thin rubber/silicone layer could make my setup perfect.
Front brake hose is fine too, I check it every time before riding and it’s not really being pulled apart. I got my bike’s warrant-of-fitness with the risers installed and they checked it and passed it.
One issue that I do have with such products is that they may not be exhaustingly QC checked and therefore there may be variances between sets. There could be a set out there that would be better than the one I have or perhaps, worse. I wish this part was manufactured be Suzuki themselves.