Probably the only special technical drawings reside at MOCO, as they probably have CAD/CAM drawings in 2D and 3D likely in AutoCad or SolidWorks respectively these days or even better.
Might ask someone at MOCO for one that you are looking for, but since they are proprietary, you may have to pay a rather princely sum and struggle to find someone there willing to part with a copy. I know that there were many "concept" artists who draw phantom drawings of prototype ones, especially the Big 4 Japanese...and Ducati because everyone loves tech LOL! I have one large one I got from the Yamaha dealer of the GTS1000, hanging in office at home.