I threw it in incase some people complained. It's technically possible though, to do the Bike Form in "human mode".Isnt Accel Bike form all CGI.
So we've had 11 suits in Double so far. Double's 10 forms + Accel.
So, you are counting movie-only Riders? I suppose that would explain part of why Ryuuki and Hibiki's numbers are so bloated...