Hey, nice report.:thumbsup:
I see you were giving a ride to Mr. Liu, a Takalamakan rally racer.:naughty:
Just by looking at the photos of JH600 one can tell it is not a trail bike. It is a long distance touring bike tuned for Chinese roads. Since I plant to take on more dirt roads in future, I am trying to put Karoo T (Metzeler) tyres on and it will surely improve on dirt road performance.
All the problems you have mentioned in the report are small problems and can be ironed out easily. Once you have decided to buy one, Mr. Liu can fix these "problems" for you.
I am used to cruise at 120-130kmh on highways and didn't find the JH600 vibration borders me. Mind you, I was on 5th gear, not 3rd gear:riding: