Re: is this for Real...Electrical Conduit for Frame building?
Conduit, (EMT) is okay for exhaust systems but DO NOT try to build a frame from it. I've seen guys build extended front forks from EMT...I would not ride that bike. Thin wall electrical conduit has some uses other than protecting and concealing wiring but bicycle frames are not one of them. Yes, it is easy to bend and make the shape you want but it does not have the strength to hold up to the stresses imposed on it as a bike frame; especially a motorized bike.
Mile steel will serve you well and if you're a qualified welder, Chrome Moly but leave the conduit to electricians.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"