In the concept sketch above, I did not do any pre-designing and just started to pushing large shapes/geometries around. Below are some images that I generated because some students asked me to show them how I rough together some Motorcycle concepts from scratch.
I always stress to my students in class, to having a clear design direction, from the very beginning of your design goal. So even in the abstract (step 1) it is already obvious where things are headed. Keep drawing!