Step 1: The Base
Add 2 blocks of coal with a 2 block space in the middle. Then to the front put a block of your choice and then a upside down stair of your choice. Put buttons on both sides of each coal block.
Step 2: The Finished Motorbike
Add a upside down stair to the back with a Slab on the back and put a black slab In front of it. Then put a slab of your choice in front of that one, and put a block of your choice in front of it. Put 2 levers on the side and flick them up and put a trapdoor in front of the wheel and there we have it your done
Step 3: Thanks!
Thanks for reading my instructable!! Here is a real motorbike to compare it to.