Closest I've seen is the Schwinn Suburban. Two members here rigged it up here.
I just don't see how to do a throttle to that twisted handlebar or why any roadie would want to add an engine to his 2 thousand dollar one pound bike.
I was thinking about that. You could do a hybrid setup perhaps with straight handlebars and a sleeker road bike frame. I was considering it since I already had a road bike, but the thought of those skinny little tires whirring along behind the force of an internal combustion engine kind of scares me.
I am finding it has impressive speed just as it is. I can't get the spedo to work with the engine running (resets all the time) but I did keep up with traffic in a 35 zone for 3/4 of a mile with both engines (me and the HT) running wide open. Had to have been pushing 40 mph. I don't really do that to often though. around 20 is a comfortable cruzing speed.
oh wow is that a 70 schwinn varsity yeah it is isnt it i built one out of a smaller frame version it is scarry on the corners but the straits you are just blazeing down the road
this was my old city pounder be carful with the frames they tend to break
and this was a 65cc type d dax engine i swear 27inch on a stock kit i was doing 45mph down the road redlined to heck but got the job done