Hello everyone. Does anyone happen to know if there is somewhere to get after market parts for the Zongshen Sierra 200? I have heard this bike is a knock off of the Yamaha YW200, but I have no concrete evidence of this. Mostly I need new sprockets from and back so I can change out my chain. It is time, and I am having a hard time finding replacements. The Warehouse in Miami is out of stock. Thanks in advance!