My first option is the Micargi Falcon GT (Black with Red Rims). Second option is the Micargi Rover GT. My concern is that the 66/80cc motor(Pirate Cycles) will not fit in the Micargi Falcon GT frame. It appears some have put a motor in them but not sure if they achieved it with the 66/80cc motor. Is there a big difference in the physical size of a 50cc vs. a 66cc. I really want the Falcon GT but not sure if it is possible and just want someone to confirm that they have seen it done with the 66cc.... Please help on my decision!!!