While this customized Kawasaki KZ250 dirt bike looks like an exercise in death-by-masochism, it’s actually created as a minimalist sprint racer that’s equal parts speed and art. Built by Valen Zhou, the bike is Frankensteined together using the base bike, off-the-shelf parts, a one-off road-bike-like chassis, exhaust tape wrap, but also a full-custom suspension, a custom aero-disc wheel in front, low-slung drop down bars, and a freakin’ bicycle seat. How’s that for Spartan? The craziest aspect, however, is the upside-down water bottle located behind the seatpost that serves as the swappable fuel tank. Helmet absolutely required.