Rough Crafts x Zero Engineering This isn’t the first bike we’ve featured by master-builder Winston Yeh. From his Shop in Taiwan, Yeh continues to turn out one-of-a-kind customs. This gothic sled is built around a highly polished Harley knuckle motor wedged into a Zero Engineering frame. All the custom body and fabrication stuff is Yeh’s handiwork. And it’s not a museum piece, it’ll peel you off if you’re not holding on tight.