Wow that's a big quest you have put your self in for. However it could be good,the only thing is there is a lot of information that I'm not sure could never be found. As I'm am certainly trying to become the foremost expert (I do mean trying) of the twin,lightweight and compact. I have certainly hit many brick walls. As one of the theory's (which I haven't been able to support) is that the 85cc and the 170cc were designed and build in Canada. I haven't been able to find anything about that theory. I even signed up to a forum over there all to no avail. So I hope you can find the information you are looking for as it could answer many many questions.
