When it comes to making fondant motorcycles, there are a few things that you will need to do in order to get the perfect result. Firstly, you will need to roll out your fondant until it is about 1/4 inch thick. Next, use a knife or cookie cutter to cut out the shape of a motorcycle from the fondant. Once you have done this, you will need to assemble your motorcycle by attaching the wheels and other details with some water or piping gel. Finally, once your motorcycle is complete, you can add any finishing touches such as painting or adding decals before allowing it to dry.