Helloww, I am an architect, though in my portfolio I do not include sketches, it is a practise I enjoy very much doing, and I am good at. I could pull off this job od the sketch of the motorcycle, during the process the number of revisions needed to get you satisfied with the final product. Do not hesitate to contact me if you have any question or issue to discuss.
Thank you for your atention,
best regards
Sofia