Surely one of you could take a tape measure with you when you polish your bike and get a couple of measurements. (?)
Seriously, I don't have access to one or I wouldn't be asking.
After I went through the consideration of getting a street bike, somehow I just realized its just not for me, right now. I however, have gained a huge interest in atc/atv's, I am cleaning up an old honda 70 three wheeler now and have an off brand three wheeler that originally came with a 8hp briggs and straton engine, that currently has no engine. The three wheeler is huge and built pretty strong, so given my experience looking over this site and at the thumper engine, I put two and two together and thought, wonder if one of those would fit...a 650cc single piston three wheeler sounds good to me. Thought I better get some dimensions first just to be on the safe side. Then there is the process of waiting for one to come along at a good price. Thanks