To accomplish this we laid the assembly on the concrete and traced the "U" shape. The backbone tube was then welded to the "U" assembly. This "U" should be longer than necessary so you can cut the material to length when you mock it up. Since the pipe bender won't make a 180* bend, you must make two pieces and then weld them together in the "U" shape. Then we made two 90* pieces of material for the rear wheel assembly. We've heard that if you count the pumps you can make the same bend twice, so you may try that method. It's not too time consuming to bend them equally in the pipe bender, though it's not an exact science. How We Built the Frameįirst, we cut and bent two sections of pipe to the same bend, roughly 100 to 110*. Our frame was made from 3/4" pipe, bent with a Harbor Freight hydraulic pipe bender. A frame that is square rather than rounded simply will not look as good. There are two main ways you can make your frame - with or without a bender. This will help you sketch your own ideas better. Surf our photos and others, and print a few out. Haven't already discovered it, there are many different styles of frame design, and subtle nuances to each. The first thing to do when considering the frame is what you want it to look like. Either you, or someone you love will be supported by it, and traveling fast - you do not want this thing to fall apart. However, you must be sure of your welding ability. The frame design is one of the most rewarding parts of building a mini chopper, so if you are able, we strongly suggest building your frame rather than buying one. Chop That Frame Up! How to Build a Mini Chopper Frame and Schematics
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