Harley-Davidson Topper

Last updated
Harley-Davidson Topper
Harley-Davidson Museum May 2024 13 (The AMF Years--1960 Model A Topper--Horizontal Two-Cycle Single).jpg
1960 Harley-Davidson Topper at the Harley-Davidson Museum
Manufacturer Harley-Davidson
Production1960–1965 [1]
Assembly Milwaukee, Wisconsin, USA
Class scooter
Engine 10 cu in (164 cc) 2-stroke single-cylinder engine [2] with reed valve [3]
Bore / stroke 2.375 in × 2.281 in (60.3 mm × 57.9 mm) [1]
Compression ratio
Top speed46 mph (74 km/h) [5]
Power 9 hp (6.7 kW) [6]
Transmission continuously variable transmission, between 18:1 and 6:1 [3]
Suspension
  • Front: leading link
  • Rear: swingarm, two extension springs
[3]
Brakes Front and rear: 5 in internal expanding drum [3]
Tires 4.00 x 12 [2] [5]
Wheelbase 51.5 in (1,308 mm) [1] [2]
DimensionsL: 75 in (1,905 mm) [2]
W: 24 in (610 mm) [2]
H: 37 in (940 mm) [2]
Seat height30 in (762 mm) [2]
Fuel capacity1.7 US gal (6.4 L) [2]

The Harley-Davidson Topper was the only motor scooter that the Harley-Davidson Motor Company ever produced. [7]

Contents

Design and specifications

The Topper had a 165 cc (10.1 cu in) single-cylinder two-stroke engine mounted horizontally between the floorboards. [8] The engine required a premixed gasoline/oil mixture. The starter was of the rope-recoil type similar to lawn mowers [1] [8] [9] or the Lambretta E model. [10] Unlike most scooters with enclosed engines, the Topper's engine did not have a cooling fan. [2] [5] [6] It was expected that the low, horizontally mounted engine would be cooled by air passing under the scooter, [2] but some Toppers developed overheating problems. [5] The engine used a reed valve in its induction system. [3]

The engine powered a continuously variable transmission [2] [9] called "Scootaway Drive" [3] [9] that included a safety device that did not allow the scooter to move from rest at engine speeds higher than 1800 rpm. [8] Final drive was by an exposed roller chain. [3] [8]

The Topper had 5 inch internal expanding drum brakes on both wheels. [3] The front brake was controlled by a hand lever [2] [3] on the left handlebar [1] with a parking brake lock; [1] [3] the rear brake was controlled by a pedal. [2] [3]

The front body, front fender and floorboards of the Topper were made of stamped steel, and the engine cover and body were made of molded fiberglass. [11] Storage space was provided under the seat; the manufacturer suggested storing extra containers of two-stroke oil there. [1]

Development

The main complaint from Topper owners was with the "Scootaway Drive" continuously variable transmission. Road grime would get into the transmission and cause the belt to slip. [1] A new transmission, with the primary drive sealed in an oil bath, was introduced for 1961. [4]

The Topper H was introduced in 1961 (sold through 1965) with a new alloy cylinder head that increased the compression ratio to 8.0:1, a reusable foam air filter, and revisions to the cylinder ports and air intake tube. [4]

A detuned version of the Topper was also available, with the power restricted to 5 hp (3.7 kW). [12] This was advertised as the "Topper U". [13] The detuned Topper was made to comply with laws in some states in the United States that allowed motorcycles with rated engine power below a stated maximum to be operated without a license [1] or to be operated on a special license by riders at a younger age than would be allowed a regular motorcycle license. [12]

A Topper was used by the Milwaukee Brewers as a bullpen car from 1959 through 1995. [14]

Performance

In 1959 a Topper was ridden from Bakersfield, California to Death Valley and back without repair or adjustments requiring tools. The route went through Trona, to Stovepipe Wells, then to Badwater Basin, then to Whitney Portal, 7,851 feet (2,393 m) above sea level on the side of Mount Whitney. It then returned to Bakersfield. [15]

See also

Notes

  1. 1 2 3 4 5 6 7 8 9 10 Wright 1987, p. 84.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Arctander 1959, p. 65.
  3. 1 2 3 4 5 6 7 8 9 10 11 Ismon 1959a, p. 14.
  4. 1 2 3 Ismon 1961, p. 18.
  5. 1 2 3 4 Dan 2007, p. 138.
  6. 1 2 Wood 2004, p. 67.
  7. HD 2015.
  8. 1 2 3 4 Arctander 1959, p. 64.
  9. 1 2 3 AECG 2007.
  10. Lambretta Model E – Lambretta Club of Great Britain
  11. Ismon 1959a, p. 13.
  12. 1 2 Ismon 1962, p. 13.
  13. Hicks 1961, p. 229.
  14. "Our Back Pages: County Stadium's pioneering bullpen cart".
  15. Ismon 1959b, p. 35.

Related Research Articles

The Loudon Classic, originally named the Laconia Classic, is an annual motorcycle road racing competition held during the Laconia Motorcycle Week at the New Hampshire Motor Speedway in Loudon, New Hampshire. Founded in 1934 when it was originally sanctioned by the American Motorcyclist Association (AMA), the race is one of the oldest motorcycle competitions in the United States. The competition changed locations over the years, starting as a dirt track race before evolving into a road race. From the late 1930s until the early 2000s, the Loudon Classic was one of the most prestigious motorcycle races in the United States, second only to the Daytona 200.

<span class="mw-page-title-main">Flat-twin engine</span> Piston engine with two cylinders in opposing directions

A flat-twin engine is a two-cylinder internal combustion engine with the cylinders on opposite sides of the crankshaft. The most common type of flat-twin engine is the boxer-twin engine, where both pistons move inwards and outwards at the same time.

<span class="mw-page-title-main">Custom motorcycle</span>

A custom motorcycle is a motorcycle with stylistic and/or structural changes to the 'standard' mass-produced machine offered by major manufacturers. Custom motorcycles might be unique, or built in limited quantities. While individual motorcyclists have altered the appearance of their machines since the first days of motorcycling, the first individualized motorcycles specifically labeled 'Custom' appeared in the late 1950s, around the same time as the term was applied to custom cars.

<span class="mw-page-title-main">Sports motorcycle</span> Motorcycles designed for performance

A sports motorcycle, sports bike, or sport bike is a motorcycle designed and optimized for speed, acceleration, braking, and cornering on asphalt concrete race tracks and roads. They are mainly designed for performance at the expense of comfort, fuel economy, safety, noise reduction and storage in comparison with other motorcycles.

<span class="mw-page-title-main">Honda Super Cub</span> Light motorcycle

The Honda Super Cub is a Honda underbone motorcycle with a four-stroke single-cylinder engine ranging in displacement from 49 to 124 cc.

<span class="mw-page-title-main">Motorcycle engine</span> Engine that powers a motorcycle

A motorcycle engine is an engine that powers a motorcycle. Motorcycle engines are typically two-stroke or four-stroke internal combustion engines, but other engine types, such as Wankels and electric motors, have been used.

<span class="mw-page-title-main">Types of motorcycles</span>

In the market, there is a wide variety of types of motorcycles, each with unique characteristics and features. Models vary according to the specific needs of each user, such as standard, cruiser, touring, sports, off-road, dual-purpose, scooters, etc. Often, some types like sport touring are considered as an additional category or integrated with touring.

<span class="mw-page-title-main">Ner-A-Car</span> Type of motorcycle

The Ner-A-Car was a type of feet forwards motorcycle designed by Carl Neracher in 1918. It used an unusual steel-channel chassis, much like an automobile, and hub-center steering at the front wheel, making it 'nearly a car' in design. The Ner-A-Car was the most successful hub-center steering motorcycle ever produced, with sales far eclipsing earlier or later examples of this design, such as the Yamaha GTS1000 or Bimota Tesi. About 10,000 Neracars were manufactured in the United States by the Ner-A-Car Corporation, while around 6,500 are believed to have been produced in England under licence by the Sheffield-Simplex company between 1921 and 1926 under the Ner-A-Car name.

<span class="mw-page-title-main">Mustang (motorcycle)</span> Reciprocating internal combustion engine

The Mustang was a lightweight motorcycle built by Gladden Products Corporation in Glendale, California, from 1946 to 1965. The second production version, the Mustang Model 2, was among the first motorcycle manufactured in the United States to have a telescopic fork.

<span class="mw-page-title-main">Harley-Davidson XA</span> Type of motorcycle

The Harley-Davidson XA was a flat-twin, shaft drive motorcycle made by Harley-Davidson for the US Army during World War II.

<span class="mw-page-title-main">Harley-Davidson Hummer</span> Type of motorcycle

The Hummer was a motorcycle model manufactured by Harley-Davidson from 1955 to 1959. However, the name "Hummer" is now incorrectly used generically to refer to all American-made single-cylinder two-stroke Harley-Davidson motorcycles manufactured from 1948 to 1966. These motorcycles were based on the DKW RT125, the drawings for which were taken from Germany as war reparations after World War II. The RT125 drawings were also given to the United Kingdom and the Soviet Union as war reparations, resulting in the BSA Bantam and the MMZ M-1A Moskva, later known as the Minsk.

<span class="mw-page-title-main">Berliner Motor Corporation</span> American motorcycling retailer

Berliner Motor Corporation was the US distributor from the 1950s through the 1980s for several European motorcycle marques, including Ducati, J-Be, Matchless, Moto Guzzi, Norton, Sachs and Zündapp, as well as selling Metzeler tires. Berliner Motor was highly influential as the voice of the huge American market to the motorcycle companies they bought bikes from, and their suggestions, and sometimes forceful demands, guided many decisions in Europe as to which bikes to develop, produce, or discontinue.

Joe Berliner [...] a man endowed with great decision-making power in Borgo Panigale

<span class="mw-page-title-main">Scooter (motorcycle)</span> Class of motorcycle

A scooter is a motorcycle with an underbone or step-through frame, a seat, a transmission that shifts without the operator having to operate a clutch lever, a platform for their feet, and with a method of operation that emphasizes comfort and fuel economy. Elements of scooter design were present in some of the earliest motorcycles, and motor scooters have been made since at least 1914. More recently, scooters have evolved to include scooters exceeding 250cc classified as Maxi-scooters.

<span class="mw-page-title-main">Charles Franklin</span> Irish motorcycle designer and racer

Charles Bayly Franklin was an engineer and a motorcycle racer. He designed motorcycles for the Indian Motocycle Company, including the original Indian Scout of 1920, the original Indian Chief of 1922, and the Indian 101 Scout of 1928. Prior to this, he had been part of the Indian motorcycle team that won first, second, and third place in the 1911 Isle of Man TT, finishing in second place. Franklin was inducted into the AMA Motorcycle Hall of Fame in 2016.

<span class="mw-page-title-main">Simplex Manufacturing Corporation</span> Defunct American motorcycle manufacturer

Simplex Manufacturing Corporation was an American manufacturer that made motorcycles from 1935 to 1975. Between 1935 and 1960, Simplex made variations of the Simplex Servi-Cycle including the 1953–1960 Simplex Automatic. Simplex was the only motorcycle manufacturer located in the Deep South for many years, until Confederate Motorcycles began production.

<span class="mw-page-title-main">Outline of motorcycles and motorcycling</span> Overview of and topical guide to motorcycles and motorcycling

The following outline is provided as an overview of motorcycles and motorcycling:

Daimler <i>Reitwagen</i> First motorcycle, 1885

The Daimler Reitwagen or Einspur was a motor vehicle made by Gottlieb Daimler and Wilhelm Maybach in 1885. It is widely recognized as the first motorcycle. Daimler is often called "the father of the motorcycle" for this invention. Even when the steam powered two-wheelers that preceded the Reitwagen, the Michaux-Perreaux and Roper of 1867–1869, and the 1884 Copeland, are considered motorcycles, it remains nonetheless the first gasoline internal combustion motorcycle, and the forerunner of all vehicles, land, sea and air, that use its overwhelmingly popular engine type.

<span class="mw-page-title-main">Lambretta</span> Brand name of Italian (mainly) motor scooters

Lambretta is a brand of motor scooters, manufactured in Milan, Italy, by Innocenti.

<span class="mw-page-title-main">Cleveland Motorcycle Manufacturing Company</span> Former American motorcycle manufacturer

The Cleveland Motorcycle Manufacturing Company, sometimes called Cleveland Motorcycle, was a motorcycle manufacturer in Cleveland, Ohio, from 1902 to 1905 and again from 1915 to 1929.

<span class="mw-page-title-main">Zündapp Bella</span> Type of motorcycle

The Zündapp Bella is a motor scooter manufactured by German motorcycle manufacturer Zündapp from 1953 to 1964. Approximately 130,000 Bella scooters were sold, with engine sizes ranging from 150 to 200 cc.

References

Print
Online