I wanted to make some drop down handlebars(being inspired by olympics) for my brother. I didn't want to spend money so I just built it out of PVC pipe.
Any length(can cut later) 1/2 pvc pipe
Heat gun or blow dryer
I went to Crafty Beaver and I got a 1/2 inch PVC pipe that was about 4 ft. It only costed like $1.
You have to then get a picture of what the handlebars look like maybe online so you know what you want it to be. You have to figure out how your hands will be on it and then make a mark where your hand fits right. Then you have to get a heat gun(or blow dryer) and heat it up right below and on the black line and then fold it down as shown in the picture. After, start going down the folded piece and bend it to your desired shape.(Note: Doing a little at a time going section by section works best so that the PVC just doesn't totally fold in.)
Once you have it curved all the way it should look a little like this:
You then have to measure how long you want the handlebars to be on you bike and then you figure out how your handles will be one the other side. You can easily cut off extra pieces.((Sorry, the pic shows me cutting the handle but you can do that also if it's too long.
Then you have to do the heating and bending to the handlebar just like you did to the first one. The ones below aren't perfect but they should look a little like this.( If the PVC starts to fold you can press it against a table or something to make it flatter.
Once you have the handlebars already finished you now just have to remove the old ones. With the bike I was using it was simple because the brakes weren't on the handlebars. I just had to twist all the nuts off the bolts and then the handlebars just came right off. If your handlebars are different you might have to unscrew the brake pads and brakes or other things.
Then you just have to stick the new handlebars on where the old ones were and screw the stuff back in. My PVC fit perfectly and you are going to want to put the nuts and bolts in tight because mine was moving when I didn't do it tight enough. Have it adjusted so that when its on tight it will fit just great. You can put some kind of grip tape or anything that will make it easier to grip. Thanks!