From the article:
When authorities searched the location they found 11 motorcycles. All but one was reported stolen. They also found all sorts of other stolen motorcycle parts with serial numbers removed or scratched out so they couldn’t be traced.
Are there people out there for whom a scratched out serial number doesn’t raise a red flag? Who buys parts from these people? How can anyone who rides a motorcycle, who loves motorcycling, buy a part that they know has been stolen from someone else’s bike?