yes, both the headlight and the tail light run off the white wire. it took a while to find the right bulb combination that would work without taxing the engine too much. what i came up with seems to work well, it starts right up without turning the lights off and from what i can tell it doesn't limit the engine at all.
as for the center bar, these stretch bikes seem to have alot of frame flex. most any weld will probably break eventually so i decided clamping it in was best. this allows the frame to flex normally while the center bar remains rigid.