Alot of the info provided are not exactly correct, in China, only cities banned motorcycles, not in the Rural areas, and considering China has a huge rural areas all over the country, so the demand for simple and economical Motrocycles are still in a big demand. last year, China produced over 25mil bikes up to 250 cc.
There are 2 levels of Banning Motorcycles, very few cities have a total ban such as guangzhou, Shenzhen that do not allow ANY motorcycles in the inner city regions. but most cities only have a restriction on motorcycles such as Beijing, Shanghai, they stop issuing Bike licenses in the late eighties but allow you to ride your bike if it has a legit license plate. but still majority of the bikes in these cities has no license or fake ones.
But there has been some relaxation of the law in Beijing and Shanghai since a few years ago, you can actually register a big cc motorcycle providing if you can get hold of a samll bike in the city that has a legit license plate and scrape this and presnet the papers with the newly imported bike doucments, then you can get a official license plate and use your bike in the city (there are some roads that you can't ride in with a Bike) but with a legir license bike, the cops can only give you a fine instead of taking yoru bike away.
For the last few years, Harley, BMW, Ducati, Benelli, Piaggio, Aprilia, MV has all opened showrooms in many cities, Harley sold over 1000 bike in China alone last year.
The restrictions are still there but it will slowly opening, buying a bike in China is more then double the price of the US, as there is a close to 80% various taxes, a legit biek license plate in Shanghai cost over US$12,000 (as Shanghai plates is same as cars and car plates has to be auctioned from the Gov't at this value).
In China, due to the Gov't has no interest and knowledge over how to control Motorcycles, so this ihas allowed a huge number of unconventional import of these used and new motorcycles into China in the last decades, we're talking about hundreds of thousands used bikes imported, recently, due to the extremely high Yen exchange, bike dealers are all coming to buy accident totalled bike in the US and fix it up in China and sell them as good bikes. also with the very expansive official imported biek prices, many people still prefer to buy used or new bikes from the US and unofficially imported into China which cost alot of problems are these bikes has no or fake licenses and when in trouble, they all fled and many times not to be found or got caught as in this reported case,
The biggest problem is, alot of these sport bike riders are young kids and these bikes has no insurance so there is accidents, the victimcan't get anything.