HARLEY-DAVIDSON MOTORCYCLE, 1913 

 Gift of Paul Edward Garber in 1 947 (USNM 313147) 



This motorcycle (fig. 95) was purchased secondhand in 

 1918 by the donor (fig. 96), and was used by him for sev- 

 eral years. It was restored by the Harley-Davidson Motor 

 Co. in 1947. The engine number is 4336-D. 



It is equipped with a 5-horsepower, 1 -cylinder, 4-cycle, 

 air-cooled, gasoline engine of 3 5 /i 6-inch bore and 4-inch 

 stroke, giving a total piston displacement of 35 cubic inches. 

 Known as the model Nine B, ct 5-35," it sold for $235 at the 

 factory in Milwaukee, Wis. 



The cylinder casting and its integral head are of heat- 

 treated gray iron. The piston is heat treated and ground 

 and is fitted with three piston rings and a hollow, steel 

 wrist pin. An I-beam section of chrome-vanadium steel, 

 fitted at both ends with phosphor-bronze bushings, serves 

 as the connecting rod. Separate camshafts for the intake 

 and exhaust valves are driven by gears in the magneto drive 

 train. The overhead, intake valve is of nickel steel, while 

 the 2-piece exhaust valve has a cast-iron head and a nickel- 

 steel stem. The crankcase is of polished aluminum, with 

 the hardened, tool-steel crankshaft mounted in it in phos- 

 phor-bronze bearings. An oil drain plug and an overflow 

 pipe are provided in the crankcase. 



Ignition was by Bosch high-tension magneto with spark 

 plug, and the fuel was vaporized by a constant-level, float- 

 equipped, Schebler carburetor. A priming petcock is lo- 

 cated in the left side of the cylinder head. A 2-section 

 tank, one for gasoline, the other for oil, is mounted at the 

 upper bars of the frame, above the engine. Filler caps and 

 shut-off metering valves are located on top of both tanks. 

 The lubricating oil for the engine passed by gravity through 

 a sight glass into the crankcase. Ignition and throttle are 

 controlled by twisting the grips of the handle bars, the left 

 for spark timing, the right for throttle opening. 



The loop-type frame of brazed tubing forms a cradle to 

 support and protect the motor. Tubular handle bars are 

 attached to a steering fork fitted with both main and recoil 

 springs. The wire-spoked, metal-rimmed wheels now 

 mount 28-by-3-inch clincher tires, though the original tires 



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