Harley-Davidson Model 7D
The Harley-Davidson Model 7D of 1911 was the first successful v-twin from Harley-Davidson, inaugurating a motorcycle engine configuration that has continued unbroken from the Milwaukee motor company ever since. Wikipedia
Also called: The Silent Gray Fellow
Engine: 49 cu in (800 cc) 45° v-twin, bore x stroke 3 x 3½"
Suspension: Coil springs in front fork tubes, sprung saddle only in rear
Top speed: 60 mph (97 km/h)