Zack and Ari are back with a new episode of On Two Wheels featuring a shootout between KTM's powerful 1290 Super Duke R and Aprilia's potent Tuono. It's V-twin versus V-4 in this battle for naked bike supremacy.

Follow along as we cruise the scenic Pacific Coast Highway, then take a rip along the Ortega Highway for a quarter-mile showdown at Auto Club Dragway in Fontana, CA.