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A 'power valve', which is a spring-loaded valve in the carburetor that is held shut by engine vacuum, is often used to do so. As the airflow through the carburetor increases the reduced manifold vacuum pulls the power valve open, allowing more fuel into the main metering circuit.
Indian Motorcycle (or Indian) is an American brand of motorcycles owned and produced by automotive manufacturer Polaris Inc. [1] [2]. Originally produced from 1901 to 1953 in Springfield, Massachusetts, Hendee Manufacturing Company initially produced the motorcycles, but the name was changed to the Indian Motocycle Company in 1923.
Polaris began developing a smaller consumer-sized, front-engine snowmobile to compete with the Ski-Doo in the early 1960s. In 1964, Polaris released the Comet. However, the Comet soon ran into problems as it could not travel in all types of snow conditions. Polaris then recalled the sleds and quickly developed a new prototype to avoid ...
Carburetors are provided with a float chamber to provide a constant hydrostatic head of fuel above the carburettor's metering jets, thus a constant pressure. The float chamber itself does not vary the pressure according to demand, but it does vary the supply flowrate with demand, to keep this pressure constant.
In 2011, Polaris Industries bought the Indian Motorcycle Company. For the 2015 model year, under Polaris's ownership, Indian introduced a new Scout model. The 2015 Scout is a cruiser with a 1,133 cc (69.1 cu in) liquid-cooled, V-twin engine and a frame formed by multiple aluminum alloy castings bolted to each other and to the engine. [35]
For the 1997 model year Polaris added twin cylinder case-reed inducted 700cc engines. They followed in 1998 with a 600cc version for those wanting a smaller displacement engine to the potent 700cc. Both the 600cc and 700cc engines were built in the US and used 39mm Keihin D-slide carburetors and digital CDI ignition and utilized a 136"x15"x1.75 ...
Weber carburetors are marked with a model code on the mounting flange, the body, or on the cover of the float chamber. [7] This begins with a number which originally indicated the diameter (in millimetres) of the throttle bore, but later lost this significance.
Carburetor icing is caused by the temperature drop in the carburetor, as an effect of fuel vaporization, and the temperature drop associated with the pressure drop in the venturi. [2] If the temperature drops below freezing, water vapor will freeze onto the throttle valve, and other internal surfaces of the carburetor. The venturi effect can ...