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For the troubleshooting of cylinder head ,please refer to the following table

Description

Damage Form

Problem

Cause

Correction

Cylinder

head

Too much oil dirt or sand

on the cooling fins.

Poor heat

radiation of the

fins on cylinder

head.

The engine overheats.

Remove the oil dirt or

sand

Carbon

deposit

the combustion

chamber

Overheating head

The engine overheats

Remove

the carbon

deposit

Failure of sparking plug

threaded hole

Air leakage between

the sparking plug and

cylinder head

The engine starts hard or

fails to start

Repair the threaded

hole or replace the

cylinder head

Serious

deformation

of cylinder head end surface

缸头末端面变形严重

Air leakage between

the cylinder head and

cylinder

The engine starts hard or fails to

start. Insufficient engine

output ;Engine speed changes

during idle run

Grind the cylinder head

end surface or replace

the cylinder head

There are pits, ablation or

pock marks, damages on

the working surface of

valve seat.

Air leakage between

the valve and valve

seat due to improper

tightness

The engine starts hard or fails to

start. Insufficient engine output;

engine speed changes during

idle run

Repair the valve seat

The inner hole of valve

guide is over worn

The fitting clearance

between the valve and

the valve is too large

Thick blue and white fume form

the exhaust muffler pipe

Replace the valve guide

The cylinder gasket is

broken

Air leakage between

the cylinder head and

cylinder

The engine starts hard or fails to

start. Insufficient engine output;

Engine speed changes during

idle run

Replace the cylinder

head gasket

更

Содержание BULL 150

Страница 1: ...1 KAYO AU150 BULL 150 Maintenance Manual WWW KAYOMOTO US VERSION CODE 20190316 VERSION NAME AU150 Maintenance Manual...

Страница 2: ...to assemble and dis assemble the plastics Chapter3 introduce the regular maintenance and adjustment Chapter4 introduce how to dis assemble the parts in the places around engine Chapter5 introduce the...

Страница 3: ...3...

Страница 4: ...esn t contain some potential risks in engine work and maintenance so besides the above explanations the service operator should also have basic mechanical knowledge and if you are not sure whether can...

Страница 5: ...strictly out of reach of children Battery charging can produce flammable and explosive Hydrogen There is an explosion risk if exposed to source of fire or spark Please charge batteries in well ventil...

Страница 6: ...lubricate If the bearings still feel stuck after cleaning replace it If it can t be cleaned replace it If the bearing is originally compaction fit with vehicle or axle diameter but it gets unsuitable...

Страница 7: ...each other correction work form a smooth friction surface which can bear heavy load by this way the engine will have excellent performance and reliability Recommended break in time is 10 hours as foll...

Страница 8: ...4 1 2 VIN number VIN number Metal plate Engine number MODEL AU150 VIN NUMBER ENGINE NUMBER 1 3 2...

Страница 9: ...enger Max loading quality 1 person 60kg 120kg Tire spec Front tire AT20 7 10 Rear tire AT19 10 9 Ground clearance 135mm Turning radius mm 2350mm Engine Start Electric Engine type Single cylinder 4 str...

Страница 10: ...everse gear Gears Forward gears 1 2 3 Reverse gear R Gear changing order By foot R N 1 2 3 Drive mode Chain driven rear axle Engine drive rotating direction clockwise Steering equipment Biggest steeri...

Страница 11: ...y cause accidents Oil pump rotor Radial clearance of inner and outer rotors 0 12mm Radial clearance between outer rotor and pump body 0 12mm Axial clearance between rotor surface and pump body 0 05 0...

Страница 12: ...coil peak voltage 1V 200r min 8 5V 2000r min Rectifier type Full wave rectification Battery Capacity 12V 7Ah Voltage Fullcharge 14 4V Not full charge 11 8V Ignition device ITEM STANDARD Ignition meth...

Страница 13: ...A Light bulb Front light 12V 35W Tail light brake light 12V 2 8W Valve mechanism cylinder cover see 05 engine section Cylinder piston piston ring crank connecting link see 05 engine section Clutch Tra...

Страница 14: ...bolt M8 1 25 20 8 22 30 10 Rear brake caliper bolt GB5789 M8 25 2 22 30 11 Rear brake disc mounting screw GB70 85 M8 16 4 22 30 12 Handle bar raisers mounting bolt GB5783 M10 1 5 30 2 45 59 13 Oil co...

Страница 15: ...10 25 Cross head tapping screw GB845 85 ST4 2 26 Cross head machine screw GB828 88 M5 16 2 27 Cross head big fat machine screw TM6 28 Rim mounting nut GB6187 86 M10 1 25 16 45 59...

Страница 16: ...grease Throttle perch connectingplace A arm bushing Steering column inner surface Seatlockmovepart Gear shift mechanism move part Lubricating grease for Handle cable bearding and all rotating parts P...

Страница 17: ...17 2 Digital gear indicator connector 3 Headlight connector 4 Neutral indicator connector older models 2017 5 Key switch connector 6 Multifunction switch Connector 7 CDI connector Note To inspect the...

Страница 18: ...r 2 carburetor overflow hose 3 Starter motor cable 4 Crankcase vent hose 5 Stator ignition pickup connector 6 Gear indicator connector 7 Voltage regulator connector Note To inspect the above parts mus...

Страница 19: ...13 8 Starter Relay 9 Battery negative terminal 10 Starter cable 11 Battery positive terminal 12 Voltage regulator rectifier 1 Tail light connector 2 Tail light 1 2 8 10 9 11 12 2...

Страница 20: ...on 2 4 1 Front number plate 17 2 4 2 Gear display front cover 18 2 4 3 Gear display 18 2 4 4 Shift lever mounting combination 18 2 5 Disassembly and Assembly of left and right footrest 2 5 1 Left foot...

Страница 21: ...escribes the order of dis assembly and assembly of plastics This chapter describes the dis assembly and assembly of racks seat outer plastic parts Hoses cables brake lines should be through the right...

Страница 22: ...ckward 2 Remove the seat Assembly Install in reverse order from dis assembly Check if the seat is installed in place and firm 2 3 2 Front rack Dis assembly Dis assemble the mounting bolts from rack 3...

Страница 23: ...ht Dis assemble rear rack 2 Assembly Install in reverse order from dis assembly 2 4 Front plate gear display front cover gear display foot gear rod mounting combination 2 4 1 Hood Dis assemble front r...

Страница 24: ...4 3 Gear display Dis assembly Dis assemble meter front cover 2 4 2 Back out 2 nuts 3 Dis assemble gear display 4 Assembly Re assemble in reverse order from dis assembly 2 4 4 Shift lever mounting com...

Страница 25: ...plate Dis assembly Dis assemble fasten screw 4 Dis assemble fasten screw 5 Dis assemble right footrest from lower to upper 6 Assembly Install in reverse order from dis assembly 2 6 Dis assembly of fr...

Страница 26: ...ssemble gear display front cover 2 4 2 Dis assemble front rack 2 3 2 Dis assemble front plate 2 4 1 Dis assemble foot gear rod 2 4 4 Dis assemble left footrest plate 2 5 3 Dis assemble right footrest...

Страница 27: ...2 4 4 Dis assemble left footpeg plate 2 5 3 Dis assemble right footpeg plate 2 5 4 Dis assemble mounting screw 2 Dis assemble rear assy plate3 Assembly Re install in reverse order from dis assembly No...

Страница 28: ...cautions Note Do not run the engine in unventilated areas exhaust contains carbon monoxide CO and other toxic components Do not touch the engine or exhaust Please wear long sleeves work clothes and gl...

Страница 29: ...or showing wear inspect or replace earlier Maintenance item Item Milometer km Circle 1000km 4000km 8000km 12000km Remarks Fuel system access I I I Fuel filter C C C C Carburetor chock Air filter I I R...

Страница 30: ...ness is less than 3mm Brake pad Tear and damage of brake pad The minimum brake pad friction plate thickness 1mm less than 1mm replace it Driving device Wheel Tire pressure Front wheel 35kPa 0 35kgf cm...

Страница 31: ...12 fuel should be reach the opening...

Страница 32: ...gap 0 6mm 0 7mm Ignition period Battery Terminal connection status Electric circuit Looseness and damage of joints Fuel device Fuel leak Throttle condition Throttle knob clearance 2 6mm Lightdeviceand...

Страница 33: ...th the vehicle on a sturdy flat surface Turn the handlebar slowly all the way left then all the way right to check if it turns smoothly If it is rough hard to turn or loose check the wire and cable ro...

Страница 34: ...a routine to check brakes condition and brake function before using the vehicle Remove screws 1 Remove master cylinder cover 2 Add brake liquid to the upper limit Note When adding brake fluid do not...

Страница 35: ...pad thickness 2 The minimum thickness should be 1 mm at grooves if less replace If the brake pads are damaged or showing cracks or abnormal wear replace them Note Please check brake fluid levels frequ...

Страница 36: ...the upper limit Note When adding brake fluid do not mix with dust dirt or water Use brake fluid from a new unopened container Brake fluid can damage plastic rubber and painted surfaces Be careful not...

Страница 37: ...ecking brake rotors Check the surface of brake disc blueing discoloration or warping 1 If its thickness 3 0mm replace Rear brake disc thickness limits no less than 3 0mm Check the brake pad thickness...

Страница 38: ...check and replace the bearing ball joints or A arm bushings Front wheel size Put the atv in a horizontal position and measure the size of the front wheel toe in The front wheel relative to the forward...

Страница 39: ...cold for a more accurate reading Appointed pressure Tire Front tire Rear tire Pressure 35kPa 0 35kgf cm2 35kPa 0 35kgf cm2 Tiresize See chapter 1 See chapter 1 Wheel pattern Check tread depth if is l...

Страница 40: ...up the front wheel turn the wheels as per the axle direction when there is no other acting force on the vehicle then check whether the vehicle will shake If there is shack then dis assemble the front...

Страница 41: ...operation should be smooth with firm clicks between each gear Shift down with toe until you reach neutral come to a complete stop then shift down with toe to engage neutral If shift lever is misadjust...

Страница 42: ...limiting device Throttle limiting device is used to restrict throttle opening Inspect the thread length limit of the limiting screw Factory set thread length should be 12mm To adjust Loosen the lock...

Страница 43: ...h back to turn lights off slide forward one position to illuminate fog lights slide all the way forward to illuminate headlights Push high beam button in to turn high beams on If any of the lights do...

Страница 44: ...oled completely to avoid injury Do not damage the frame engine body bolts and cables during maintenance In order to protect the engine frame please wrap the engine before operating When the engine is...

Страница 45: ...ration should be carried out in a well ventilated place When disassemble the plastic parts loose the tube 1 of oil throttle then dismount the oil switch bolt 2 and remove switch remove tank mounting b...

Страница 46: ...filter 2 Assembly In reverse order from dis assembly Re install all components 4 3 Exhaust system Dis assembly Dis assemble foot gear rod seat gear display front cover front assy Plate rear assy Plat...

Страница 47: ...ssembly 4 4 Dis assembly and assembly of engine Dis assembly Dis assemble shift lever seat gear display front cover left and right footpeg plate rear assy Plate see 02 plastics Dis assemble fuel tank...

Страница 48: ...oved to prevent oil leaking Disconnect gear display connect wire 1 7 Disconnect magneto trigger connect wires 1 7 Disconnect starter motor plug 4 Disconnect carburetor hoses 3 Remove engine mounting b...

Страница 49: ...47 5 5 Maintenance of machine 69 5 6 Dis assembly assembly and maintenance of carburetor 78 5 7 Maintenance of air in take and out put system 81 5 8 Dis assembly assembly and maintenance of air out p...

Страница 50: ...r more people working together more attention should be paid for safety When starting the engine indoors be sure to vent the exhaust outside If toxic or flammable substances are used handle in accorda...

Страница 51: ...required Use special lubricants binders and sealants When fastening bolts screws and nuts tighten the large to small and tighten from inside to outside in a cross pattern to the specified torque Use a...

Страница 52: ...at the beginning of the its use it can make the moving parts to adapt to each other correction work form good heavy load to bear a smooth friction surface Through this process the engine will has exc...

Страница 53: ...place Replace once per 2000km Filter media Clean Clean Clean Clean Timing chain Check Adjust Adjust Adjust Carburetor idle speed Adjust Adjust Adjust Adjust Drive chain Adjust and lubricate per 5000km...

Страница 54: ...ble assemble and maintenance cylinder head Right view of the 150 engine Left view of the 150 engine Remove the locknut of cylinder head from its holding place Remove cylinder head Check the state of p...

Страница 55: ...4 Dismantle the fixing bolt of left cover Remove left cover and inspect the paper pad for damage Replace Dismantle the fixing bolt of right cover...

Страница 56: ...Remove the right cover of cylinder head Inspect the gasket for damage and replace Remove inlet exhaust valve cap Check the state of seal ring of valve cap and replace if worn or if reuse is questionab...

Страница 57: ...6 Remove the fixing bolt of timing driven sprocket Remove the connecting bolt of cylinder head Remove cylinder head assembly...

Страница 58: ...if necessary Check whether there is excessive carbon deposit in combustion chamber Clean and replace if necessary Remove the cylinder head Pour gasoline into inlet exhaust pipe to inspect the seal con...

Страница 59: ...nd check the state Replace if necessary Inspect the oil seal of inlet exhaust valve for damage Replace if necessary Remove the spark plug to clean the carbon deposit and dust Check the spark plug gap...

Страница 60: ...d cylinder The engine starts hard or fails to start Insufficient engine output Engine speed changes during idle run Grind the cylinder head end surface or replace the cylinder head There are pits abla...

Страница 61: ...star Remove the carbon deposit between the electrodes Excessive carbon deposit or oil dirt in the spark plug Weak or no sparking from the spark plug electrodes The engine starts hard or fails to start...

Страница 62: ...check for wear and damage Replace if necessary Dismantle the fixing bolt of timing chain of guide wheel Remove the guide wheel of timing chain to inspect for wear and damage Replace if necessary Disma...

Страница 63: ...ston of piston pin to check whether it is damaged Replace if necessary Inspect the paper pad for worn or damage Replace if necessary Check whether there is residual gasket on cylinder Clean with gasol...

Страница 64: ...place if worn or if reuse is questionable Check whether the internal diameter has exceed the limit value Measure the diameter form upper middle and lower position The limit value is 50 05mm Replace th...

Страница 65: ...er head The engine starts hard or fails to start Insufficient engine output poor idle speed and high fuel consumption Grind the cylinder end surface or replace the cylinder body The cylinder is badly...

Страница 66: ...her the oil seal of starting shaft and seal edge of gearshift lever are worn Replace if necessary Check the state of right crankcase cover and replace if necessary Left view of right crankcase half is...

Страница 67: ...16 Dismantle fixing bolt of left crankcase cover Remove the neutral indicator and check the state Replace if necessary Dismantle the fixing bolt of magneto stator and remove the stator...

Страница 68: ...ace the gasket The threaded hole of oil drain plug screw is ineffective Oil leakage from the threaded hole of plug screw Repair of replace the crankcase The threaded holes of cylinder bolt are ineffec...

Страница 69: ...ight crankcase is broken Oil leakage between the case cover and the case Replace the gasket Left crankcase cover The left crankcase cover is worn or cracked Oil leakage form the case cover Repair or r...

Страница 70: ...the washer of main shaft and countershaft when removing the left crankcase Remove the paper pad to inspect for wear and damage Replace if necessary Remove the connecting rod assembly Inspect connectin...

Страница 71: ...micrometer Replace the piston pin if the value is over the maintenance limit value Check the axial and radial jumping of connecting rod bearing Replace the conrod if the jumping islarge Check the side...

Страница 72: ...the state of piston and replace if worn or if reuse is questionable Measure diameter of piston skirt Replace it if the value is beyond the maintenance limit value Assemble the piston ring according to...

Страница 73: ...and ring groove are over worn Excessive fitting clearance between the piston and the cylinder The engine starts hard or fails to start Insufficient engine output Thick blue and white fume form the exh...

Страница 74: ...ed Thick blue and white fume form the exhaust muffler pipe Fixing again the piston ring set Piston pin The piston pin is over worn The fitting clearance between the piston pin and the hole is too wide...

Страница 75: ...amage Abnormal sound during sprocket driving Replace the timing sprocket 5 5 Maintenance of Mechanism 5 5 1Disassemble assemble and maintain valve mechanism Remove rocker arm shaft Remove the rocker a...

Страница 76: ...alve Remove inlet vale stem and exhaust valve stem take care and don t miss the valve clip Measure length of valve spring to check whether the spring is damaged or worn Replace if necessary Remove the...

Страница 77: ...stem if the valve is beyond the maintenance limit valve Measure the width of valve contact surface to check whether the contact surface is rough or abnormal Replace the valve stem if the valve is lar...

Страница 78: ...r arm shaft and rocker arm Replace the rocker arm shaft and rocker arm if the gap is large Check the external diameter of rocker arm using a micrometer Replace the rocker arm shaft if the valve is bey...

Страница 79: ...place if worn or if reuse is questionable Remove the timing tensioner arm to inspect for wear and damage Replace if necessary Remove the oil tube and spring and check the state Replace if necessary Re...

Страница 80: ...front cylinder Turn magnetic rotor counterclockwise to make piston locate at top dead center and make T mark aimed to the mark of left crankcase cover Check whether the O mark on cam sprocket is aimed...

Страница 81: ...haft The bearing of the camshaft is over worn or damaged The axial or radial clearance of the bearing is too wide Ineffective bearing swiveling or abnormal sound during swiveling Abnormal sound heard...

Страница 82: ...lve seat tightly The engine starts hard or fails to start Insufficient engine output Engine speed changes during idle run Remove the carbon deposit The working surface is over worn or has pits pock ma...

Страница 83: ...letely The engine starts hard or fails to star Replace the valve Valve spring The spring is ineffective or fractured It is impossible to fit the valve and the valve seat tightly The engine starts hard...

Страница 84: ...ean throttle cap Clean the carburetor as follows Remove the dirt and clean inner oil way Dismantle the fixing bolt of float chamber cap Remove the float chamber cap Remove the water and debris in the...

Страница 85: ...state of float case and replace as necessary Adjust the height of float case by moving the float up or down Take out the main jet to check whether the jet hole is clogged Clean if necessary Remove th...

Страница 86: ...etor as the following Standard Tighten mixture screw and turn it one And a half turns clockwise Measure height of float case to check whether it is distorted or there is oil in the case If height is i...

Страница 87: ...ease refer to the followingtable Description Damage form Trouble Cause Correction Air filter Too much dust on the filter core The engine starts hard or fails to start Insufficient engine output poor p...

Страница 88: ...ffler Dismantle suspension bolt of muffler to check whether the suspension support is damaged Repair or replace if necessary Remove the muffler to inspect for broken and damage Replace or repair if ne...

Страница 89: ...r tightness and tighten as necessary Inspect the connecting circlip of air pump for tightness Tighten if necessary Description Damage form Trouble Cause Correction Exhaust pipe gasket The gasket is br...

Страница 90: ...n and replace if necessary For the troubleshooting of environment protection valve please refer to the followingtable Maintenance of environment protectionvalve Parts Damage form Trouble Cause Correct...

Страница 91: ...to check damage and wear Change if necessary connectin g hose connecting hose get loose noise is too big Emission fails to meet the standard Replace Gasket large noise from secondary inlet air leaks f...

Страница 92: ...41 Dis assemble left crankcase cover Dis assemble gasket to check condition Change if damage or can t use Dis assemble magneto stator fixing bolt trigger bolt...

Страница 93: ...Check stator condition with a multiple use meter Replace if damage or can t use Dis assemble rotor fixing bolt Dis assemble rotor with a dedicated tool Check if rotor is with magneto Change if necessa...

Страница 94: ...fixing bolt Dis assemble clutch check clutch holder ball and spring for damage and ware Change if necessary Check transmission sprocket and gear for damage and ware change if necessary Dis assemble s...

Страница 95: ...44 Dis assemble tension band of clutch and check condition for damage and problem change if necessary Dis assemble retainer ring of start motor sprocket Dis assemble driving sprocket and chain...

Страница 96: ...5 Dis assemble start motor fixing bolt Dis assemble start motor Check if the start motor winding is damaged change if necessary Dis assemble oil separating plate and check condition change if necessar...

Страница 97: ...46 Check the oil seal edge if damaged change if necessary Dis assemble seal ring and check condition change if damaged...

Страница 98: ...spring Armature commentator surface is fouled Starter motor hasinsufficient rotation force Clean the commentator surface with gasoline or alcohol Armature commentator surface is spotted burnt or dama...

Страница 99: ......

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