I've allways liked this frame for a few reasons,first that the tubes are very thick walled(better suited to adult weight)for being motorized next is the wheel base being longer is actually more stable and smoother,and the center of gravity being so low you can turn really tight at good speeds comfortably.Lastly as mentioned there is alot of room yes but no easy way to mount an engine it needs some fab work therefore not many people use them witch makes it less commen to see around compared to all the mountain,cruiser,gas frames out there.I agree that an electric version is also a good choice as I have done both and am currently doing a four stroke version.The electric one hauls me and the old lady around town and will do 30 mph 2 up!LOL No pic of the four stroke build yet it's truly from ground up because my son wants to keep the 20"x 3"fat tires and it has to have disk brakes so the wheels are being done at the moment.