Here's the 14th of the 2012 Auto Art Advent series. I'll be adding a new sketch every day until Christmas. To make it more of a surprise, this year they'll be in a range of different materials and styles.
This one's a made up hillclimb special - big v-twin, twin rear wheels... Pencil and watercolour on watercolour paper. Hope you enjoy them. (If you'd like to own one they'll also be on my Etsy store for a very reasonable £24 :)