Suzuki GS1000 (1980) Инструкция по эксплуатации онлайн [102/477] 114749

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FUEL SYSTEM CARBURETORS DO NOT ADJUST THE AIR SCREW AND PILOT SCREW Both of these components are pre set at the factory using very specialized equipment They can not be reset to the exact setting determined by the factory Refer to the emission control systems and regulation chapter for further information Description This motorcycle has four carburetors each of which must be so adjusted properly to assure engine performance The link motion is moved by the two throttle cables that are connected to the throttle grip to open or close all carburetor throttle valves at the same time 6 Throttle valve Fig 8 3 Each carburetor has four units for regulating and supplying fuel There is the starter unit for supplying a rich fuel air mixture when starting the engine a pilot unit for supplying fuel when the engine is idling a main unit for supplying fuel when the engine is running at medium or high speed and a float unit for maintaining a constant carburetor fuel level The carburetors mix gasoline with air and regulates the mixture Carburetor malfunctioning or trouble generally occurs due to a bad mixing ratio which is the result of wearing blocking by foreign matter or an improper fuel level The following are some of the symptoms of a faulty carburetor Fuel air mixture too lean 1 The engine becomes overheated 2 The engine runs well when the starter is opened further 3 Poor acceleration 4 The spark plugs become overheated 5 Engine speed is irregular 6 Exhaust gas is light Fuel air mixture too rich 1 The engine is sluggish and does not run smoothly 2 The engine runs badly when the starter is opened further 3 The engine runs badly after being warmed up 4 The engine runs well when the air filter is removed 5 The spark plugs get soiled with carbon 6 Exhaust gas is blackish in color STARTER UNIT The starter unit is a starting aid device which supplies a highly concentrated gasoline air mixture to a cold engine at initial starting It consists of a starter jet starter pipe and starter plunger Refer to close the throttle valve open the starter plunger fully and switch on the starter or kick Then the engine will generate negative pressure to draw the fuel through the fuel injection ports The fuel is metered by the starter jet is mixed with the air coming from the float chamber in the starter pipe sucked into the starter plunger chamber where it is mixed with the starter s primary air and then drawn out into the main bores from the injection ports as a well atomized and concentrated fuel very suitable for starting purposes This fuel air mixture is added to the fuel air mixture being supplied by the pilot circuit in the carburetors When using the starter the throttle valve must be completely closed If the throttle valve is opened the negative pressure falls and will not build up at injection ports and the engine will not be able to draw sufficient fuel The starter plunger has a needle like tip which closes the starter unit s fuel passage If the starter lever is not pulled all the way up the fuel passage will not open to let the gasoline flow If the starter pipe s bleed hole is clogged the fuel will not be atomized properly 8 3

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