I am currently working on creating some parts for Yamaha motorcycles (2008-16 YZF-R6 specifically) and have been having some fitment problems from reverse engineering the relevant parts to the ones I am designing. It would make things a lot easier if I had the OEM CAD files to work off of, but I have had limited success finding anything useful so far. SEMA has a database with plenty of CAD files for auto racing and part development, but nothing for motorcycles (https://www.semagarage.com/techtransfer/Index). I also found a page for GM vehicles that provides a similar service (https://www.gmupfitter.com/), but the only thing I’ve been able to find for motorcycles are user created files from CAD sharing websites.
Anyone here had any experience finding something like this? And if the best way is to contact the manufacturer, how would you go about asking / who should I ask?