The shrill howl of the 250 six needs to be heard at a NSFW volume. Grab your headphones. But its otherworldly shriek is only the half of it. The 250 six is one mean cuss. Note how difficult the thing is to get off the line… and then keep it going. Because the RC166’s crankshaft is so light, closing the throttle kills the engine. Plater first kills it going into Ballacraine (around the six-minute mark) and the tension’s written all over his face. Rounding the corner, slipping the clutch to fire it back up, and revving the RC’s guts out, Plater gives a toothy grin and exuberant yell to the crowd. Undeterred, he keeps it pinned through Kirk Michael, strafing the curbs, tachometer bouncing above 17,000 rpm. Brutal. Brilliant. Beautiful.