Dear Victor,

You are getting the classic Shanghai runaround. You need to push LZD to help you deal directly with the factory, since both Xiao Fan (at the shop in Honggu Lu) and Liu do not really know what they are doing with the JH600. Though LZD rides the 600B, neither of these guys has any experience riding the two-wheel 600A because they say it's too big for them. The guy in Pudong, who we call Dr Cui, is a very capable mechanic but he too has very little experience with the JH600, especially as a rider. He's a wizard with engines, but knows nothing about how the bike should ride. To my knowledge, he's ridden the JH600 only once, and that was Motokai's.

Prepare to be very firm with them. LZD usually does get results, but sometimes you have to push. And he works at his own speed.

Dr Cui is wrong about vibration. The JH600 has a very well balanced engine and produces very little vibration. It is a thumper, with just one big cylinder running four strokes. So you cannot compare the feeling to a twin or quad cylinder bike. But in our experience, the bike runs quite smoothly at all rpms and speeds. You should insist on this.

Be sure to follow up with Motokai, who can help you understand what gets a response from LZD.

good luck!