I bought a Harley and Gold Wing set of maintenance CDs for those bikes, sold commercially and legally, by knowledgeable techs. There should be some trained Kymco techs or very experienced Yager "wrenches" out there who could do that and maybe make some money. Check out "fix my hog" and "Angelfire" videos for what I'm talking about.
Disclosure: I am not related to any of those who produced the mentioned videos, and do not receive anything to advertise them. I paid around $100 for each set!
They were very useful to work on my other bikes, including good quality video step by step instructions, factory specs, torque settings, capacities, and helpful tips.