Just last week, Yamaha’s US trademark filings tipped off a possible three-cylinder sport-tourer from the Japanese OEM, and in that article we noted how intellectual property filings are becoming an important element in spotting new models from motorcycle manufacturers.

The irony of course is that patents and trademarks are designed to protect the intellectual property of applicants; but in our case, they often give notice to things OEMs would like to keep secret. Such is the case with what we believe is the Honda CB300F, a single-cylinder naked bike that is based off the Honda CBR300R small-displacement sport bike.