Re: Micargi Rover 7 speed.
Hambro, I could be wrong but I believe the Micargi Rover is built using the same frame as the Micargi General (pull up pictures of the two of them online and check them out side-by-side). The difference is that the Rover has gears and brakes and a flashier color scheme - the General is quite basic.
FYI, lots of room for engines and carbs inside this frame, but check your frame welds occasionally - I ran across rumors about Micargi frame welds failing. No issues with mine yet, even after somewhere around 250 miles of riding. I really like the basic shape of the bike.
Anyway I'm attaching a couple of pictures of my Micargi General at different stages in its motorized life. To get an idea what yours will look like, think of this bike with a more conventional fork and a glossy black color scheme. Hope this helps!