Now, according to MoreBikes, the company has filed a patent for this concept.
The patent application could be simply for protecting the concept's design and does not confirm a production cafe racer motorcycle.
The Honda 300 TT Racer Concept is built around the same frame as the Honda CBR300R and Honda CB300F, and also shares the 286 cc single-cylinder engine with the 300 series motorcycles. It however uses a completely new subframe to support its single-seat seating configuration and exceptionally shorter rear-end.
The motorcycle in the patent image doesn't seem a lot different from the one revealed as a concept in Thailand. However, on a closer look, the instrument panel, rear hugger and rear disc brake appear different, and the tail seems to have been extended further back.