Yamaha XS400 (1976-1982) [16/34] Yamaha xs360 400

Содержание

• A sight glass in the crankcase is pro 1
• Below 15 c 59 f use sae 10w 30 service rating se or sf 1
• Checking oil level xs400gisg on 1
• General specifications ________________ 1
• In order to prevent possible confusion when ordering parts always refer to the engine and frame serial numbers 1
• Lubrication 1
• Maintenance 1
• Motor oil 1
• Note common maintenance procedures are explained in detail in general infor mation 1
• Recommended lubricants chart at the end of this section 1
• Serial number location 1
• Side of the steering lug while the engine number is located on a raised boss just be hind the right cylinder on the top of the crankcases 1
• Straight grades can also be used according 1
• The frame number is stamped on the right 1
• To ambient air temperatures as given in the 1
• Vided to enable the rider to check oil level at a glance when checking the motorcycle should be parked on the centerstand on a level surface 1
• When the air temperature is consistently 1
• When the average air temperature is above 5 c 41 f use yamalube 4 stroke oil or sae 20w 40 service rating se or sf 1
• Yamaha xs360 400 1
• Changing oil 2
• Filter screen 2
• Front forks 2
• Oil filter 2
• Other models 2
• Yamaha xs360 400 2
• Chassis lubrication 3
• Clutch 3
• Drive chain 3
• Service checks and adjustments 3
• Yamaha xs360 400 3
• Brakes front disc 4
• Rear disc 4
• Throttle cable 4
• Yamaha xs360 400 4
• Brake light switches 5
• Front drum 5
• Fuel system 5
• Headlight adjustment 5
• Petcock 5
• Rear drum 5
• Yamaha xs360 400 5
• Air filters 6
• Although major overhaul of the carbu 6
• Blow out the elements from the inside 6
• Carburetors 6
• Caution do not let gasoline spill on a hot engine 3 remove the four screws which secure 6
• Check the sealing washer and replace it 6
• Clean the filter screen in a solvent be 6
• Disconnect the fuel line from the petcock and the vacuum line from the manifold 6
• Each float bowl and carefully lower the bowls until they are clear of the float mechanism 6
• If it is damaged 6
• Install the petcock after the tank is 6
• Install them 6
• Intervals 6
• Maintenance data 6
• Make sure that the petcock is shut off 6
• Note after several such cleanings the elements should be replaced with new ones the service interval for replacement will depend upon the amount of dirt build up on the elements 5 refit the elements into their cases and 6
• Periodic maintenance 6
• Pilot jets these are fitted to the float bowl on 360 models and are on the carburetor bodies on 400 models blow the jets clear then rein stall clean any foreign matter out of the float bowls when installing position the bowls carefully to avoid damage to the floats tighten the screws gradually and evenly check for fuel leaks before operation 6
• Recommended lubricants 6
• Refitted check for leaks before operating the motorcycle 6
• Remove the case screws and separate 6
• Remove the gas tank drain off the fuel 3 unscrew the petcock securing nut or 6
• Remove the side covers 2 loosen the carburetor clamp remove 6
• Res position drain the fuel from the car buretor float bowls by removing the main jet cover bolt from the bottom of the float bowls 6
• Retors requires their removal as a unit the float bowls and jets can be cleaned with the units in place 6
• Set the petcock to the res position 6
• Sure to remove any foreign matter trapped in the screen as this will impede fuel flow if the screen cannot be cleaned or if it is punc tured or otherwise damaged it should be re placed 6
• The case halves removing the filter element 6
• The element case holder screw take off the securing band and remove the element case 6
• Two phillips screws depending upon the method of fastening and pull off the petcock 6
• Unscrew and remove the main and 6
• With compressed air 6
• Yamaha xs360 400 6
• Cam chain adjustment 7
• Compression test 7
• Contact breaker points 7
• Location 7
• Replacement 7
• Tune up 7
• Valve adjustment 7
• Yamaha xs360 400 7
• Dynamic timing 8
• Gapping 8
• Ignition timing breaker point models 8
• Lubrication 8
• Yamaha xs360 400 8
• Adjusting float level 9
• Carburetors 9
• Ignition timing xs400g sg h 9
• Static timing 9
• Synchronization 9
• Yamaha xs360 400 9
• Connect the vacuum gauges 5 start the engine and note the vacuum 10
• Ders must be within 5 cm hg 0 in hg adjust if necessary by turning the synchro nization screw in or out until the vacuum readings for the two cylinders is as identical as possible 10
• Feed line if necessary so that the synchro nization screw between the carburetors is ac cessible 10
• Idle speed and mixture 10
• Idle speed is set by means of the throt 10
• If the limiter caps are missing or if the 10
• Manifolds the vacuum gauge fitting for the right cylinder operates the fuel petcock dis connect the petcock line from the fitting and turn the petcock to the prime position for the duration of the procedure 10
• Note if the vacuum gauges read more than 5 cm hg 0 in hg at 1 200 rpm check the compression spark plugs igni tion timing and valve clearance 6 if vacuum gauges are not available a 10
• Pilot screws have been removed as during a carburetor overhaul pilot screw adjustment is accomplished by screwing the pilot screws in very carefully until lightly seated then backing them out 1 turns on 360 models and 1 turns on 400 models 10
• Readings at idle 1 200 rpm the two cylin 10
• Rough method of synchronizing the carbu retors may be carried out remove the car buretors as a unit from the motorcycle look into the engine side of the carburetors and note the relative positions of the edges of the butterflies in relation to the small by pass passages in the bottom of the bores both butterflies should be in the same position relative to these by pass holes 10
• Screw fitted to each carburetor the screws are fixed in position by means of idle limiter caps this is designed to reduce emissions therefore it is not generally necessary to ad just the pilot screws 10
• The idle mixture is controlled by a pilot 10
• The vacuum gauge fittings are on the 10
• Tle stop screw between the carburetors idle speed is 1 200 rpm and must be adjusted when the engine is at operating temperature 10
• Tune up specifications 10
• Yamaha xs360 400 10
• Cylinder head removal 11
• Engine and transmission 11
• Engine removal and installation 11
• Engine service 11
• Top end 11
• Yamaha xs360 400 11
• Cylinder and piston removal 12
• Cylinder head 12
• Inspection camshaft 12
• Rocker arms and shafts 12
• Valve assembly 12
• Yamaha xs360 400 12
• Cylinders and pistons 13
• Lapping 13
• Seat cutting 13
• Yamaha xs360 400 13
• Cylinder and piston installation 14
• Cylinder head installation 14
• Piston rings 14
• Yamaha xs360 400 14
• Clutch removal 15
• Crankcase cover components 15
• Yamaha xs360 400 15
• Gearshift mechanism removal 16
• Inspection 16
• Installation 16
• Kickstarter shaft removal 16
• Oil pump 16
• Yamaha xs360 400 16
• Alternator starter drive removal 17
• Case assembly 17
• Engine sprocket removal 17
• Inspection 17
• Installation 17
• Lower end and transmission 17
• Splitting the crankcases 17
• Transmission gear shift assembly removal 17
• Yamaha xs360 400 17
• Assembly 18
• Crankshaft removal 18
• Inspection 18
• Yamaha xs360 400 18
• 1 blue 19
• 2 black 19
• Before installing connecting rods on the 19
• Berance is towards the intake side of the engine be sure that the rods are installed so that the cap numbers align with the rod num bers 19
• Big end bearing no crankpin no 19
• Brown green 19
• Coat the con rod bolt threads with a 19
• Crankcase no journal no insert 19
• Crankpins thoroughly lubricate the bearings with motor oil install the rods so that the yamaha mark on both rods faces the left end of the crankshaft and the bearing protu 19
• Engine specifications 19
• Going to be replaced be sure that the weight codes stamped on the rod and cap match for both rods 19
• If one or both of the connecting rods is 19
• Insert 19
• Molybdenum disulphide lubricant and 19
• Replace big end bearing inserts with in 19
• Rod side play at the small end if the move ment exceeds 0 mm 0 19 in the big end bearing should be replaced 19
• Serts of the same color code if the color is no longer visible on the old insert select a re placement according to the following chart 19
• Torque them to 24 28 ft lbs 19
• With a dial gauge check connecting 19
• Yamaha xs360 400 19
• Checking oil pressure 20
• Engine specifications cont 20
• Engine torque specifications 20
• Inspection 20
• Installation 20
• Lubrication system 20
• Oil pump 20
• Operational description 20
• Removal 20
• Yamaha xs360 400 20
• Carburetors 21
• Fuel system 21
• Installation 21
• Lubrication system specifications 21
• Removal 21
• Yamaha xs360 400 21
• Disassembly 22
• Inspection 22
• Yamaha xs360 400 22
• Alternator output check 23
• Assembly 23
• Carburetor specifications 23
• Charging system 23
• Electrical system 23
• Field coiliarmature tests 23
• Fuel petcock 23
• Yamaha xs360 400 23
• Breaker point ignition 24
• Pick up coil removal and installation 24
• Rectifier 24
• Regulator 24
• Transistorized ignition 24
• Troubleshooting 24
• Yamaha xs360 400 24
• Brake light 25
• Electrical components 25
• Inspection 25
• Neutral indicator 25
• Starter motor service removal and installation 25
• Starter solenoid 25
• Starting system 25
• Taillight 25
• Testing 25
• Turn signals 25
• Yamaha xs360 400 25
• Oil pressure indicator 26
• Self cancelling turn signal system 26
• Wiring diagrams 26
• Yamaha xs360 400 26
• Yamaha xs360 400 27
• J xs400fonly 28
• Wiring diagrams 28
• Xs400 2e 28
• Xs400f 2f 28
• Yamaha xs360 400 28
• Chassis 29
• Wiring diagrams 29
• Yamaha xs360 400 29
• Bleeding 30
• Disc brake service 30
• Flushing 30
• Precautions 30
• Rear wheel assembly removal and installation 30
• Tubeless tires 30
• Wheel bearings 30
• Yamaha xs360 400 30
• Caliper 31
• Front disc brake pad replacement 31
• Master cylinder 31
• Yamaha xs360 400 31
• Disc service 32
• Dissassembly 32
• Front drum brake 32
• Front forks 32
• Inspection 32
• Rear disc brake 32
• Rear drum brake 32
• Removal 32
• Yamaha xs360 400 32
• Assembly 33
• Bearing adjustment 33
• Disassembly 33
• Inspection 33
• Installation 33
• Steering stem assembly 33
• Yamaha xs360 400 33
• Assembly 34
• Inspection 34
• Rear shocks 34
• Removal and installation 34
• Swing arm 34
• Yamaha xs360 400 34

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Yamaha XS360 400 plate and the steel and friction plates Note should be replaced with reference to these 2 Rotate the return spring clockwise and the order of the steel and friction plates lash letters Gears should be paired as fol hook it onto the projection lows 5 Remove the pushrod 6 Remove the clutch hub circlip thrust Primary gear Clutch gear washer and remove the clutch hub Gearshift Mechanism A C 7 Remove the clutch housing noting any В D REMOVAL thrust washers on the engine or hub side of c E the housing 1 Remove the right crankcase cover Re move the clutch assembly INSPECTION 2 Remove the engine sprocket cover left 1 Check the condition of the kick start INSTALLATION side 1 Installation is the reverse of disas shaft oil seal If it leaks or if the lips show 3 Remove the circlip from the gearshift signs of damage pry the old seal out with a sembly When fitting the clutch plates alter shaft on the left side of the engine and pull small screwdriver Press the new seal nate steel and friction plates The last plate out the gearshift assembly from the right straight into the cover Apply some oil or installed should be a friction plate 2 Install the pressure plate so that the INSPECTION grease to the seal lips before installation 2 Check the condition of the clutch arrow on the plate aligns with the arrow on 1 Check the gearshift shaft for a bent con cover mating surface Remove any burrs or the clutch hub dition and replace it if it is bent Check the 3 Tighten the pressure plate screws grad imperfections with an oilstone condition of the gearshift shaft splines 3 Measure the thickness of the friction ually and evenly 2 Check the condition of the shift fingers 4 Tighten the primary gear bolt to 29 33 plates and replace them if they are less than Note any chipping or wear to the finger ends ft lbs 2 7mm 0 106 in thick Replace the fingers if they are bent or worn 4 Place the steel clutch plates on a flat 3 Inspect the shift mechanism springs surface such as a piece of glass and check for Kickstarter Shaft and replace them if weakened or broken excessive warpage by attempting to slip a REMOVAL feeler gauge blade between the surface and INSTALLATION 1 After removing the right crankcase the plate Replace the steel and friction 1 Installation is the reverse of removal plates as a set if warpage exceeds 0 05 mm cover the kickstarter shaft can be removed After fitting the mechanism temporarily in by pulling it out 0 002 in stall the gearshift lever and test shifting ac 5 Measure the free length of each clutch tion through the gears spring and replace them as a set if any are 2 In each gear check that the shift fingers found to be less than 34 6 mm 1 36 in long are equidistant from the shift drum pins or if their length varies If the latter is true Refer to the illustration If they are not be sure that all of the screws are evenly tight loosen the adjusting screw locknut and turn ened on assembly the screw to equalize the distances Use a 6 Check the friction plate tabs for wear non permanent thread locking compound on or damage Check the clutch housing for in the adjusting screw after the adjustment is dented wear caused by the tabs Remove any correct Do not forget to tighten the locknut burrs with a file or oilstone 3 Check for freeplay in the gearshift 7 Check the corresponding splines of lever There should be none If any is evi the clutch hub and steel plates for indented dent the return spring is evidently weak wear ened and should be replaced 8 Using a dial indicator check the When Installing the pressure plate align the pushrod for a bent condition Replace the arrow on the plate with that on the clutch hub pushrod if it is bent more than 0 2 mm 0 008 in 9 Check the condition of the clutch gear teeth Note any pitting or chipping Check the primary gear teeth as well If damage to either is noted replace both The primary gear is replaced by removing the securing bolt and pulling off the gear 10 Note the lash letters stamped on the clutch gear and primary gear The gears Removing the kickstarter assembly 2 When disassembling the shaft compo nents lay each one out in the order removed to facilitate assembly INSPECTION Primary gear lash notation 1 Check the condition of the kickstarter shaft splines 2 Check the kickstarter gear teeth for chipping or other damage and replace it if such damage is noted 3 Check the condition of the shaft return spring The spring should be replaced if it will not return the shaft quickly to the rest position and hold it securely in place INSTALLATION Clutch gear lash letter location 1278 Use the adjusting screw to equalize the two clearances Indicated 4 Check that the shift finger return spring will hold the fingers firmly against the shift drum pins If not replace the spring Oil Pump Refer to Lubrication System for oil pump 1 Set the kickstarter gear clip into the removal inspection and installation proce groove in the crankcase dures