I have 1700 miles on my ZX, only problem so far was the tail light quit working. Trying to dial the suspension in on mine, haven't gotten the rear skid to perform like I want it to yet. On big bumps it is bottoming out at the front of the rear skid. Just stiffened the spring on the front arm tonight, shortened the spring up by a little over an inch. Also turned the red nut on the rear arm as far as it will go clockwise and turned the inner adjustment one more click to clockwise. Gotta run it some more now to check.