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Harley-Davidson Model 7D

Field	Value
name	Model 7D
image	North Cluster Bikes 3.jpg
caption	A Model 7D (right) on display at The Art of the Motorcycle exhibition at Guggenheim Las Vegas in 2003. To the left is a 1915 Iver Johnson Model 15-7.
aka	The Silent Gray Fellow
manufacturer	Harley-Davidson
production	1911 —
class	standard
engine	49 cuin 45° v-twin, bore x stroke 3 x 3½"
top_speed	60 mph
power	6.5 bhp
transmission	Leather belt w/pulley tensioner clutch
suspension	Coil springs in front fork tubes, sprung saddle only in rear
wheelbase	56.5 in
dry_weight	295 lb
related	1911 Model 7A

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.

In 1909, Harley had made a few examples (27 units The Model 7D's motor was the F-head IOE engine, in use until 1929. It sold for US$300, which with inflation would be $ in today's currency.

Ignition was via a magneto, and the engine was started using bicycle-style pedals. Instead of a conventional clutch, a pulley belt tensioner could be moved, allowing the leather drive belt to slip. A 1911 Model 7D from the George Pardo collection was set to be auctioned in January 2014.

Notes

References

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References

Rafferty (2001) p. 118
) of another v-twin, but the design was flawed and they did not try again until two years later. In 1911, 5,625 Model 7Ds were manufactured.Statnekov (1998) p. 117
de Cet (2001) p. 110
"Jean Davidson's Harley-Davidson family album". Voyageur Press.
O'Clair, Jim. (January 9, 2014). "One of Harley's first V-Twins to cross the block".
"George Pardos Collection "Evolution of the Harley-Davidson Motorcycle": 1911 Harley Davidson 7D Twin". MidAmerica Auctions.

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