It uses the EXACT same part (down to the model number), and we're wondering why Kawasaki hasn't done a recall on theirs.
Because often the specification isn't bad, but the manufacturing process had a defect that only affected a specific run or a batch. It is quite possible that even with the same part number that one batch sold was defective while another was not.
Usually, this can be attributed to production lines using materials to their absolute limit (stamps, presses, drill bits, etc) to try and maximize profit. Occasionally one goes just enough out of spec to slip by QA, but then is corrected in the next batch after the worn production parts are replaced.