My assumption is that tenting motorcycles is probably very difficult or impossible because there would be fear of the renter being responsible for anyone injured on it. People drive quite crazy in Chengdu, motorcycles are doubly dangerous here compared to in the developed West.
Just to give you an example, they used to rent motorcycles at Dali which you could rent and drive all around the local lake with, but one year an expat did this and was injured. Since then I don’t think they rent motorcycles out to foreigners.
If you buy a motorcycle here though, you can have it shipped to wherever you’re going, in addition to the option of driving it there obviously. A lot of motorcycles are manufactured in Chongqing and are shipped all around the world from there. So if you want a great deal, shop in Chongqing.