Those are not as common as their v-twin, which I never heard anything bad about other then they look cheap.

Here is a an interesting modification of one, the 250-J has a Honda type parallel twin apposed to their more common offering that is a copy of a VX250 Yamaha, the QJ version has EFI and is legitimate in China. If the 250-J is from before 2010 it likely is grandfathered for meeting new emissions?

http://autocarukadvice.blogspot.com/...t-tracker.html