How do you make a mountain bike?

Answer 1

Isn't clear if you're asking about how to build a jump, or how to get the bike to jump. To get the bike to jump the basics is to ride it over the jump and as you hit the top brace your legs. To build a jump depends on what you're trying to build it off. Planks and boards can be a bit tricky, as the bike can hit with quite a lot of force. sand, soil and dirt is more idiot-proof. Make a pile, stamp the ride surface down, ride over it and figure out what to change. Do note that jumping bikes carries a risk. Some bikes aren't up to it, some jumps aren't up to it and some riders aren't up to it. If any of this applies to you you can get hurt. At the least, wear a helmet.