Re: The costs of building from a free frame
I'm with Bairdco on this one.
Even on an economy build, a good old frame is the foundation for the build. The first place to dump some money is in stout wheels and they don't have to be fist class worksman either. I think you could get by with a cheap frame more easily with a four stroke than the China girl. The vibration of the motor subjects these frames to stresses they were not designed for which is why if you're going two stroke especially, you need a strong frame. In my mind, the frame and the wheels are the foundation of the build. You can live with rusty handlebars and a crusty seat. If you're on a budget, forgo the shiny paint and chrome and go for the sound foundation under you. I don't even want to think about a frame breaking or wheel collapsing at speed. Like building a house, start with a sound foundation.
Someday when I grow up I will probably lose interest in toys with wheels, but until then...