I've done some research on what exact model Keiichi's motorcycle is but I'm not getting anything definit. I'm pretty sure it's based off of a real BMW bike, I'm just not getting the year or anything. Here's what info I've gotten thus far. One site said it was a BMW Boxer RS. Answers.com gave a little more, but I couldn't get anywhere with it. "Keiichi owns a modified BMW RS with 49cc OHC air-cooled flat-twin air pipes and traditional flat-twin engine which is based on Oscar Liberman's special style RS with an additonal sidecar in the manga."
I'm sort of shopping for it; so I'm looking for the model/year/special info, I would need to find or modify one to match it. Yes I'm a geek. :) I have a shirt that says it proudly. :)
Thank you in advance for helping me out!