1915-1916 Harley Davidson Model 11-12

  • September 20

1915-Harley-Davidson-Model-11J

For 1915, a proper three-speed transmission was offered, along with a magneto and electric lighting system incorporating a taillight that could be removed for use as a nighttime service light.
The model featured in this article, however, is equipped with a Prest-O-Lite headlight, which is powered by acetylene gas.
Harley-Davidson’s 61-cubic-inch F-head V-twin, while not a true overhead-valve design (only the intake was ohv), was more advanced than the flathead engines that powered some competitors.
Furthermore, the 1915 models gained an automatic oiler and larger intake valves, the latter helping to boost output to 11 horsepower. That rating, by the way, was guaranteed by Harley-Davidson, the only motorcycle manufacturer to back its quoted power claims in writing.
Elsewhere, the 11F was perhaps not so advanced. The expanding-band rear brake now featured double action to increase braking efficiency, yet was far from state-of-the-art, and the front suspension remained a leading-link arrangement with coil springs that allowed only slightly more wheel travel than the nonexistent rear suspension.

ENGINE: F-Head 45° V-twin
Bore x Stroke: 3.31 x 3.5in (84 x 89mm)
Displacement: 60.33ci (987.67cc)
Horsepower: 11 @ 3,000 rpm
Transmission: 3-speed
Primary drive: Chain
Final Drive: Chain
Brakes: Rear drum
Ignition: Coil/point
Frame: Steel, single downtube
Suspension: F. Leading link spring
Wheelbase: 59.5in (151.5cm)
Weight: 325lb (147kg)
Fuel capacity: 2.75gal (10.4lit)
Oil capacity: 5qts (2.4lit)
Tires: 28 x 3.0in (71.1 x 7.62cm)
Top speed: 60mph (97km/h)
Color: Harley Davidson gray

1915tranny




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