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Twin Cam Engine (Harley-Davidson)
The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with nearly all previous Harley-Davidson engines. Both engines have two cylinders in a V-twin configuration at 45°, are air-cooled (some touring models use liquid cooling for the heads), and activate valves with push-rods. The crankshafts have a single pin with a knife and fork arrangement for the connecting rods. These are sandwiched between a pair of flywheels. The Twin Cam 88 was a traditional design from Harley-Davidson, using two cams to drive the valvetrain, with the first being the famous '8-Valve' OHV V-twin racing models of 1915. Their 1920s single-cylinder models (the A, AA, BA, BB, and Peashooter) also used twin camshafts in the timing chest, and did ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorcycle Engine
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. Although some mopeds, such as the VéloSoleX, had friction drive to the front tire, a motorcycle engine normally drives the rear wheel, power being sent to the driven wheel by belt, chain or shaft. Historically, some 2,000 units of the Megola were produced between 1921 and 1925 with front wheel drive, and the modern Rokon, an all terrain motorcycle with both wheels driven, has been produced since 1960. Most engines have a gearbox with up to six or even 7 ratios. Reverse gear is occasionally found on heavy tourers, for example the Honda GL1600, and sidecar motorcycles, such as the Ural. The rider changes gears on most motorcycles using a foot-pedal and manual clutch, but early models had hand-levers. More recently, some have automatic or semi-automatic ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flathead Engine
A flathead engine, also known as a sidevalve engine''American Rodder'', 6/94, pp.45 & 93. or valve-in-block engine is an internal combustion engine with its poppet valves contained within the engine block, instead of in the cylinder head, as in an overhead valve engine. Flatheads were widely used internationally by automobile manufacturers from the late 1890s until the mid-1950s but were replaced by more efficient overhead valve and overhead camshaft engines. They are currently experiencing a revival in low-revving aero-engines such as the D-Motor. The side-valve design The valve gear comprises a camshaft sited low in the cylinder block which operates the poppet valves via tappets and short pushrods (or sometimes with no pushrods at all). The flathead system obviates the need for further valvetrain components such as lengthy pushrods, rocker arms, overhead valves or overhead camshafts. The sidevalves are typically adjacent, sited on one side of the cylinder(s), though some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonnier Corporation
Bonnier LLC (formerly Bonnier Corporation) is an outdoor adventure company that fuels passion for fishing, boating, sailing, motorsports, hunting and travel. Bonnier has the nation’s leading portfolio of experiential events and iconic media brands in the marine category, and an extensive series of nationwide motorsports and hunting events. Publisher oSalt Water Sportsman Sport Fishing Boating an Sailing World Bonnier produces award-wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycle World
''Cycle World'' is a motorcycling magazine in the United States. It was founded in 1962 by Joe Parkhurst, who was inducted to the Motorcycle Hall of Fame as "the person responsible for bringing a new era of objective journalism" to the US. ''Cycle World'' was the largest motorcycling magazine in the world. The magazine is headquartered in Irvine, California. Regular contributors include Peter Egan and Nick Ienatsch. Previous or occasional contributors have included gonzo journalist and author Hunter S. Thompson, journalist and correspondent Henry N. Manney III, and professional riding coach Ken Hill. Parkhurst sold ''Cycle World'' to CBS in 1971. CBS executive Peter G. Diamandis and his associates bought CBS Magazines from CBS in 1987, forming Diamandis Communications, which was acquired by Hachette Magazines the following year, 1988. In 2011, Hachette sold the magazine to Hearst Corporation, which in turn sold ''Cycle World'' to Bonnier Corporation Bonnier LLC (formerl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasted Spark
A wasted spark system is a type of ignition system used in some four-stroke cycle internal combustion engines. In a wasted spark system, the spark plugs fire in pairs, with one plug in a cylinder on its compression stroke and the other plug in a cylinder on its exhaust stroke. The extra spark during the exhaust stroke has no effect and is thus "wasted". This design halves the number of components necessary in a typical ignition system, while the extra spark, against much reduced dielectric resistance, barely impacts the lifespan of modern ignition components. In a typical engine, it requires only about 2–3 kV to fire the cylinder on its exhaust stroke. The remaining coil energy is available to fire the spark plug in the cylinder on its compression stroke (typically about 8 to 12 kV). Advantages Perhaps the most significant advantage of the system, compared to a single coil and distributor systems, is that it eliminates the high-tension distributor. This significantly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harley-Davidson Sportster
The Harley-Davidson Sportster is a line of motorcycles produced continuously since 1957 by Harley-Davidson. Sportster models are designated in Harley-Davidson's product code by beginning with "XL". In 1952, the predecessors to the Sportster, the Model K Sport and Sport Solo motorcycles, were introduced. These models K, KK, KH, and KHK of 1952 to 1956 had a sidevalve ('flat head') engine, whereas the later XL Sportster models use an overhead valve engine. The first Sportster in 1957 had many of the same details of the KH including the frame, fenders, large gas tank and front suspension. The original Sportster line was discontinued in Europe in 2020 because the engine failed to meet the stricter Euro 5 emissions standards. An all-new model, called the Sportster S and equipped with the Revolution Max engine, was introduced in 2021. It was the first motorcycle under the Sportster nameplate to receive a new engine since 1986, and the first Sportster to have an engine not derived from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balance Shaft
Balance shafts are used in piston engines to reduce vibration by cancelling out unbalanced dynamic forces. The counter balance shafts have eccentric weights and rotate in opposite direction to each other, which generates a net vertical force. The balance shaft was invented and patented by British engineer Frederick W. Lanchester in 1907. It is most commonly used in inline-four and V6 engines used in automobiles and motorcycles. Overview The operating principle of a balance shaft system is that two shafts carrying identical eccentric weights rotate in opposite directions at twice the engine speed. The phasing of the shafts is such that the centrifugal forces produced by the weights cancel the vertical second-order forces (at twice the engine RPM) produced by the engine. The horizontal forces produced by the balance shafts are equal and opposite, and so cancel each other. The balance shafts do not reduce the vibrations experienced by the crankshaft. Applications Two-cylinder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harley-Davidson Dyna
The Harley-Davidson Super Glide was a motorcycle made by the Harley-Davidson. Reputed to be the first factory custom motorcycle,Mitchel, D. "Harley-Davidson Chronicle - An American Original" p. 234 Publications International Limited, 1997 it originated Harley-Davidson's FX series of motorcycles by mating Sportster components, most notably the front end, with the chassis of their larger big twin motorcycles. Super Glide models from 1991 to 2018 were based on the Dyna Glide chassis which has a wider variety of front ends and trim levels, and for a time filled the intermediate niche between the smallest and largest Harley-Davidson models; the Dyna platform has since been discontinued for the 2018 model year in favor of the new Softail frame, with some models from the Dyna nameplate being carried over to the Softail line. History 1971 FX Super Glide From 1934 to 1970, with the exception of the Servi-Car, there have been two distinct lines of V-Twin Harley-Davidson motorcycles, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Softail
A softail (shortened form of ''soft tail'') motorcycle intentionally looks like vintage motorcycles with a rigid hard-tail frame that has a triangle of steel tubes at the rear axle, like on a bicycle frame, but on a Softail these tubes are actually a triangular swingarm, with the shock absorber(s) hidden, as opposed to clearly visible regular twin shocks on both sides of the rear wheel on standard bikes. Since the introduction of the Harley-Davidson ''FXST Softail'' in 1983 as a registered trademark of the Motor Company, ''softail'' has become a genericized trademark for other models of cruiser motorcycles with Suspension (motorcycle)#Rear suspension, rear suspensions hidden for retro style reasons. This was done even though the rear wheel was often hidden behind bags or exhaust pipes. The hard tail becomes obsolete The first Suspension (motorcycle)#Rear suspension, rear suspensions on motorcycles were introduced before World War I, and many companies offered fully suspende ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Police Harley 96 CID
The police are a constituted body of persons empowered by a state, with the aim to enforce the law, to ensure the safety, health and possessions of citizens, and to prevent crime and civil disorder. Their lawful powers include arrest and the use of force legitimized by the state via the monopoly on violence. The term is most commonly associated with the police forces of a sovereign state that are authorized to exercise the police power of that state within a defined legal or territorial area of responsibility. Police forces are often defined as being separate from the military and other organizations involved in the defense of the state against foreign aggressors; however, gendarmerie are military units charged with civil policing. Police forces are usually public sector services, funded through taxes. Law enforcement is only part of policing activity. Policing has included an array of activities in different situations, but the predominant ones are concerned with the pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harley-Davidson WLA
The Harley-Davidson WLA is a Harley-Davidson motorcycle that was produced to US Army specifications in the years during and around World War II. It was based on an existing civilian model, the WL, and is of the 45 solo type, so called due to its engine displacement and single-rider design. It acquired the nickname "Liberator" Model designation The model number breaks down as follows: * W : the W family of motorcycles. Harley-Davidson (except in very early models) gives a letter designation for each model family. The W series at the time was the newest incarnation of the flathead motor, and was developed from the earlier R family 1932–1936. * L : "high compression", in the usual HD scheme. The "low compression" W model was only briefly available. * A : Army. The company would also produce a model to the slightly different specifications of the Canadian Army, which would be named the WLC. The WLCs differed from WLAs chiefly in the use of some heavier components, usually B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flywheel
A flywheel is a mechanical device which uses the conservation of angular momentum to store rotational energy; a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed. In particular, assuming the flywheel's moment of inertia is constant (i.e., a flywheel with fixed mass and second moment of area revolving about some fixed axis) then the stored (rotational) energy is directly associated with the square of its rotational speed. Since a flywheel serves to store mechanical energy for later use, it is natural to consider it as a kinetic energy analogue of an electrical inductor. Once suitably abstracted, this shared principle of energy storage is described in the generalized concept of an accumulator. As with other types of accumulators, a flywheel inherently smooths sufficiently small deviations in the power output of a system, thereby effectively playing the role of a low-pass filter with respect to the mechanical velocity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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