To give some perspective here, these levers are used on
tens of thousands of scooters, as well as with disc kits made and sold by UK and German companies, etc. And on ScootRS kits. Personally, I've neither heard of, nor seen, a single lever breaking in all the years we've sold them. Nor, for that matter, other lever types we sell.
In this case, I'm told this item had been used for 3 months. At any point it could have been slightly hit/bent and cracked. Or not, but clearly it has nothing to do with Asia, nor is there a general quality concern.
As for an Asian company not caring, we replied to the 2 emails we received as following. The first said, "I've emailed 3 times, why no answer?" We replied the same day that it was the first email received, and asked what it was about. A 2nd email explained and said a photo was attached. We replied the same day and said no photo was attached, please send one. No email after that.
We also linked to our guarantee page as we were asked to pay for extra repairs to avoid publicity. But certainly we'd let people know ourselves if we had a concern, so not an issue for us. Extra repairs are not covered by a UK retailer if you are going too fast to stop after a front brake cable snaps, or if your new crank or piston seizes and you dump your scooter. Same with us. Unlike most shops, however, we clearly state our guarantee on our website so there are no misunderstandings and our site is set up so you cannot even checkout without reading and confirming you agree. So, again, no worse ordering from Asia.
Regarding calipers, since we secured a direct supply of Nissin many years ago, we have sold only Nissin. We have never told anyone we didn't try a different type prior to that, in fact we emailed all old disc customers after we changed and explained why and offered the new type at-cost. Note, that was long before even one of the old type ever cracked (subsequently I think I've only seen 2 on forums); we changed simply to improve the general quality as we were rebuilding all the others before using them. We left the offer open for over a year. That is from an Asian company. In the UK and Germany, however, you will
still find these old type calipers being sold to this day by various retailers because cheaper, usually on sand cast hubs that are known to crack as well.
Hope it helps hearing direct from a company.