I've never been one for branding - if you don't know what it is or who made made - so sad. . . the R6 stuff looks good, but perhaps a pic w/out YAMAHA across the top and bottom? #21 doesn't do a thing for me. . . (little yamer logo up top).
However, the tuning fork logo in your picture is for Yamaha music. The Powersports logo has the tuning forks extend to the edge of the outer circle. I would do option 2 and add the tuning fork logo to the tank :thumbup:
cut and applied graphics late last night... here are the pics, an improvement... but im not so sure i like them i will probably redo after more planning - since i have a vinyl cutter its no big deal