V-Twin Heritage. Thunderstroke Muscle. The new Chief Vintage's legendary Thunderstroke 116 air-cooled V-twin delivers 120 ft-lbs of torque straight from the factory, exceptional power at low RPMs and a smooth, responsive ride at any speed. It’s the kind of commanding performance that defined the American V-twin and still sets the standard today. Painted cylinder heads, pushrod tubes, and non-machined fins echo the raw aluminum of the original Chief models. A continuation of what we started. A no