There is a fine tradition of being dangerously cheap in all two-wheeled motorsports. I think that other posters might give you an unequivocal "No," but I think there is room to make a judgment call:
My advice is to look at your bike parts, and use only those that are overbuilt.
For example, bicycle handlebars for department store bikes (like the OCC, or Stingray chopper bikes) are heavy, thick steel with generally crappy chrome. You won't be able to break them, or most of the clamps and stems I've seen.
By the same token, the tires they come with (which are way better when used on other, better bikes IMO) are really thin rubber. Even if they fit perfectly, you can actually tear them on road debris. Also, the bottom triple tree clamp on department store choppers is kind of weak, but the top clamp (which is just a brace) is often better than some of the ones that came with original mopeds.