I've run up against the problem of rules stipulating no motorcycles more than a few times, especially in exclusive gated communities or retirement communities. The problem generally has to do with noise and the number of complaints generated by residents or tenants. I've also heard an owner state publically that motorcyclist generate the wrong image. Since its private property, owners can pretty much do anything they want as long as its clearly stipulated in the lease or deed restrictions or HOA bylaws in the case of a private community. Its also quite common to ban commercial vehicles, boats, trailers, RV's, large trucks, etc.
Getting a manager or owner to bend is next to impossible because if they allow one, they no longer maintain the legal right to ban any others without the possibility litigation. Its easier to ban them all and be done with it.