Liking the look of the bikes a lot! The construction seems superb and keep a nice profile. Good craftsmanship.
To the one on the right:
1) I adore the red tires and the sweet rims!
2) Do the long chains have any impact on performance (for the engine AND your legs)?
3) That being said, the picture here makes it look like the pedal chain is, uh, going into the engine somehow?

4) Did you infuse this bike with "The Force"? Because I don't see a kickstand anywhere on it.
5) The silver color throughout is VERY classy!
6) Where are the brakes!? O_O
To the one on the left:
1) It probably doesn't feel too good not having any padding on that metal seat, right?
2) With the pedal configuration the way you have it (hooked right up to the engine) are you, in essence, "kick-starting" the engine?
3) Is that a disc brake system on the front of it?
4) Not seeing any wiring or exhaust... is the bike not finished?
5) In regards to number 2) and assuming an answer of "yes", the chain apparently goes around the bottom tube of the bike, and into the opposite side of the engine where the chain normally enters/exits. How did you work this out!?
I look forward to checking out your reply. Once again, keep up the good work!
---Lewk