“Fender and Firestone police, here I come,” Winston Yeh quips, as we discuss the latest custom motorcycle to roll out of the house of Rough Crafts. Based on a 2020 Harley-Davidson Fat Bob 107, it's a stripped-down, low-slung bobber, swathed in typical Rough Crafts finishes. And yes, it has no front fender and it wears sawtooth treads (although they're from Duro, not Firestone). Winston's fully aware that his stylistic choices might irk some of our readers, but he's unfazed. This is a special…