Yamaha XS400 (1976-1982) [3/34] 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 justed to the prescribed free play at the them if they are cracked ripped or other tight spot Note however that such a conwise damaged 8 Add the proper quantity of oil to each fork leg 9 Check the condition of the fork cap orings and replace them if they are damaged Refit the springs fork caps snap rings and rubber caps 10 After several miles of operation check the area around the fork slider seals for leaks Chain play Is the total up and down movement or seepage Even a minimal amount of seep measured In the middle of the lower chain run age will require replacement of the seals A coating of grime building up in this area over a period of time is also indicative of ineffec tive seals Chassis Lubrication Removing the rubber fork cap 3 Fork capacities are as follows XS360 XS400D XS400 2E 130 cc 4 4 oz XS400E XS400F 2F XS400G SG ON 142 cc 4 8 oz Note that the amounts shown are to be added to each fork leg 4 Support the front wheel off the ground by placing a jack or the like beneath the engine 5 Remove the rubber caps at the tops of the fork legs Press down the fork caps slightly with a screwdriver or similar in strument and remove the snap rings Re move the fork caps Pull out the fork springs 6 Place a suitable container beneath one of the fork sliders and remove the drain screw After most of the oil has drained off pump the slider up and down a few times to 1 The swing arm pivot is fitted with two grease nipples which should be lubricated with chassis grease every 2 000 miles Apply grease until it shows at both ends of the swing arm pivot Chain adjusting bolt and swing arm alignment marks dition is indicative of a worn chain and probably worn sprockets which should be replaced as soon as possible 3 To adjust the chain first back off the rear brake adjuster nut on drum rear brakes 4 Remove the axle nut cotter pin and loosen the axle nut several turns Loosen the locknut on each chain adjuster bolt 5 Turn each of the adjuster bolts in or out by equal amounts until the chain tension is approximately correct 6 Check wheel alignment by means of the aligning marks inscribed on both sides of the swing arm Be sure that both adjusters are lined up with the same mark on each side If not tum one of the adjuster bolts in or out so that alignment is achieved 7 Tighten the axle nut and adjuster bolt nuts and check the chain tension Correct if Swing arm grease fitting necessary After adjustment is correct 2 Wheel and steering head bearings are torque the axle nut to 50 72 ft lbs Fit a new cotter pin Readjust the rear lubricated with bearing grease the service brake on drum brake models interval being 8 000 miles SERVICE CHECKS AND ADJUSTMENTS Clutch 1 Cable adjustment must always be main tained at the proper specification If the cable has insufficient free play the clutch will slip 1 On 1976 78 models the chain should and rapidly bum out If it has too much play have about 10 20 mm 0 4 0 8 in of total the clutch will not completely disengage up and down free play measured in the mid resulting in hard shifting and creeping at dle of the lower chain run stops On 1979 and later models chain free play 2 Use the cable adjuster at the handlebar should be 30 35 mm 1 2 1 4 in to maintain the correct amount of cable slack 2 Before checking or adjusting thechain The clutch hand lever should be able to be slack the following conditions should be met moved 2 3 mm 0 08 0 12 in measured be a The motorcycle should be placed on tween the lever and the lever holder before both wheels with a rider sitting with his the clutch begins to disengage If clutch operation is not satisfactory after weight on the seat b The transmission should be placed in making this adjustment proceed as follows 3 Screw the cable adjuster at the lever in neutral c The chain should be clean and well all the way thus increasing cable free play 4 Remove the clutch adjuster cover plug lubricated d The chain should have been checked Loosen the clutch adjusting screw locknut for any tight spots by slowly rotating the 5 Tum the adjusting screw clockwise wheel and checking for variances in the until a slight resistance is felt then tum it chain tension at different points If a tight counterclockwise tum Holding the screw spot exists the chain tension should be ad in this position tighten the locknut Drive Chain Fork filler cap remove any oil remaining in the forks Check the condition of the drain plug gasket and replace it with a new one if necessary Refit the drain screw and tighten it securely Repeat the procedure with the other fork leg 7 Examine the drained oil If it contains water or is exceptionally dirty it may be that the fork dust covers are damaged and allow ing foreign matter to get past This will also damage the fork seals quickly Check that the dust covers are properly secured and replace 1265