Yamaha XS360 (1976-1982) [22/34] Yamaha xs360 400
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Yamaha XS360 (1976-1982) [22/34] Yamaha xs360 400

Yamaha XS360 (1976-1982) [22/34] Yamaha xs360 400

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Yamaha XS360 400 Disassembly 1 Remove the drain plug at the bottom of each float bowl Holding the carburetors in the normal operational position allow the gas to drain off Refit the drain plugs to prevent loss 2 Remove the angle iron bracket which runs by the float bowls and holds the carbu retors together 3 Loosen the choke rod securing screws and disconnect the choke rod from the starter plungers Pull out the rod Take care that the shaft positioning balls on the left and right do not pop out 4 Remove the bracket which holds the carburetors together at the caps 5 Separate the two carburetors 6 Remove the carburetor cap Take out the return spring Carefully so as to avoid damage to the rubber diaphragm lift out the throttle slide assembly 7 Remove the float bowl screws and carefully lift off the float bowl until it clears the floats If the bowl is stuck rap it once on the side with the screwdriver handle This should be sufficient to break it free 8 Using a small punch push out the Removing the float bowl float pivot pin and remove the float bulbs 9 Lift out the float needle 10 Unscrew and remove the float needle seat and gasket 11 Unscrew and remove the pilot and main jets On XS360 models these are fitted to the float bowl but on the 400 they are on Unscrewing the main jet Removing the plunger assembly 15 Remove the idle limiter caps from the pilot screws and remove the screws 16 Unscrew and remove the starter plunger from the carburetor Inspection Choke shaft securing screw and plunger location Carburetor top and throttle slide assembly Removing the float needle Removing the float bowl screws 1284 the carburetor body Jets are brass and should be removed carefully to avoid dam age 12 Pry out the washer beneath the needle jet and remove this jet by tapping it out with a wooden dowel or the like from the top of the carburetor 13 Remove the float bowl gasket 14 Remove the banjo bolt for the fuel feed line from the left carburetor 1 Clean the carburetor body and float bowl in a carburetor cleaner or solvent which is safe for plastic parts and dry thoroughly 2 Use compressed air to blow air and fuel passages clear 3 Clean all fuel jets in the same manner CAUTION Do not insert anything into the jet passages to clear them use air pressure only 4 Inspect the carburetor body for any vibration or stress cracks 5 Check the condition of the throttle slide Smooth movement of the slide on the carburetor body is imperative If the slide sticks or binds at any point from full closed to wide open replace it 6 Inspect the needle jet and the needle The needle must be free of nicks or score marks along its tapered portion More often however these components will need to be replaced because of normal wear As the throttle slide moves up and down while the machine is in operation the needle is rub bing against the jet Eventually these com ponents will wear enough to cause a notice able rich running condition in the mid throttle range If this occurs both the needle and the jet should be replaced If the components are more than four years old new ones should be fitted before attempting to tune the carburetor or taking remedial ac tion to correct a rich condition such as lower ing the needle 7 Carefully inspect the float Shake the float close to your ear listen for any gasoline trapped inside If the float assembly leaks or if any puncture is noted replace it do not at tempt repairs

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