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Yamasaki YM50-8B, User Manual, Page: 2 / 28

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Yamasaki YM50-8B User Manual Download Page 2

   

 

FOREWORD 

 

Thanks for your purchasing this motorcycle. 

With the help of this manual, you will learn the correct procedures of operation and basic knowledge of 

maintenance and trouble shooting of the motorcycle. It presents all the basic knowledge of maintenance and trouble 

shooting of the motorcycle. It presents all the details of the performance of this motorcycle to you and the vehicle 

will make your life more relaxed and happier. 

In case any picture does not agree with the vehicle physically, the latter shall prevail. 

Summary of Contents for YM50-8B

Page 1: ...USER S MANUAL ...

Page 2: ...ntenance and trouble shooting of the motorcycle It presents all the basic knowledge of maintenance and trouble shooting of the motorcycle It presents all the details of the performance of this motorcycle to you and the vehicle will make your life more relaxed and happier In case any picture does not agree with the vehicle physically the latter shall prevail ...

Page 3: ...t of Rear Brake 18 Switches on Right Handlebar 9 Vehicle Washing 20 Switches on Left Handlebar 10 Instructions for Storage 21 Gear Shifting 11 Resumption of Service after storage 22 V Checking Adjustment and Maintenance 12 Table of Torque for fasteners 22 Machine Oil Checking 12 Resumption of Service 23 Renewal of Machine Oil 12 Table of Maintenance 24 Cleaning of Machine Oil Tank 13 VI Electrical...

Page 4: ...e following points to avoid any possible hurt to you by other motorized vehicles Do not drive too close to other vehicles Never contend for lane Strictly observe the local traffic rules As driving at overspeed is the cause of many accidents Do not drive at a speed that the actual situation does not permit Particular care should be exercised at the level crossing of roads entrance and exit of parki...

Page 5: ... drive or ride as they may get caught on the operating lever kick footrest or wheel resulting in danger Modification of the vehicle Caution Any unauthorized modification of the vehicle or replacement of the original parts can not ensure driving safety and is illicit The user must observe the regulations of the traffic conrtol authorities We are not responsible for any vehic le with unauthorized mo...

Page 6: ...haust valve 0 08mm Climbability Ground clearance 190mm Capacity of gasoline k 15L Ignition means CDI Transmission ratio 1 st gear 3 273 2nd gear 1 937 3rd gear 1 611 4th gear 1 350 5th gear Final reduction 3 258 Overall length 2060mm Cylinder bore x stroke Overall width 800mm Compression ratio Overall height 1145mm Output max Dead weight 110kg Idling speed Wheelbase 1300mm Torque max Front wheel 2...

Page 7: ...4 III PARTS SUBASSEMBLIES ...

Page 8: ...5 ...

Page 9: ...6 ...

Page 10: ...ion of the fuel cock ON With the handle of the fuel cock to ON position the fuel circuit is through for fuel supply OFF With the handle of the fuel cock fo OFF position the fuel circuit is cut off without supply RES With the handle of the fuel cock to RES position the fuel is supplide from the reserve Note The reserved fuel can only be used when the normal supply is run out In this case refueling ...

Page 11: ...to 1 4turn 3 Start the engine by the electric or the kick starting system 4 Slightly turn the throttle twist grip to increase the speed of the engine so as to warm up the engine 5 Turn the carburetor choke bar downward to fully open the choke when the engine is sufficiently warmed up Caution The engine can only be started after the neutral position is ascertained Otherwise accident will happen Unn...

Page 12: ... position push the button to start the engine Light switch The front light switch has three positions And a white point When the switch is in this position the front head light button tail and meter lights are all lit up When the switch is in this position the tail betraying and meter Iights are lit up When it is in this position The front illuminator tail betraying and meter lights are all off ...

Page 13: ...hes on Left Handle bar 1 Headlights dimmer button Position Headligh is in high beam Position Headligt is in low beam 2 turning light switch position Left position Right 3 Horn button press this button for horn ...

Page 14: ...hanging the gear abruptly NOTE N Neutral gear 1 1th gear 2 2 nd gear 3 3rd gear 4 4th gear 5 5th gear Points for Attention during Drive 1 Avoid unnecessary idling of the engine and it is not allowed In particular to have it idling at a high speed Other wise it will damage components seriously 2 Shift to the low speed gear when feeliing that the power is not strong enoush on climbing 3 It is forbid...

Page 15: ...ording to the table on the right side Renewal of Machine Oil Machine oil plays a very important role in the normal operation of the engine and for this reason it is necessary to check the motorcycle for machine oil periodically and renew the oil once every800 1 000km of driving by the following procedures Remove the screw plug from the bottom of the hot engine to drain off all old oil Wash the oil...

Page 16: ... be done by untrained persons but shall be done at an authorized service center 1 Remove the cap of spark plug and screw off the spark plug by the plug wrench 2 Clean the spark plug all aroud or replace it if it is corroded or there is too much deposit on it 3 Regulate the gap of the spark plug to 0 6 0 7mm 4 The spark plug of the designated type should be used The applicable type of spark plug NH...

Page 17: ...pe it dry with dry cloth Soak it in clean machine oil squeeze it dry and fit it back to position Recommended oil 15W 40QE Caution The air filter element for use must be intact or the enine will suck in dust and dirt resulting in a shorter service life of the engine Water should be prevented from entering into the filter in washing the vehicle The filter shall never be cleaned with gasoline or any ...

Page 18: ...rating movenent again Repeat the adjustment if necessary until it is as required Adjustment of Carburetor Caution The adjusting procedures of idling speed 1 Support the vehicle by a stand 2 Adjust the idling speed by the throttle stop screw 1 to 1500 150rpm Caution Do not try to cover up any trouble of other parts of the carburetor by adjusting the idling speed In case of any abnormality with the ...

Page 19: ... Swing the rocking arm slightly A loose rocking arm which indicates the existence of clearance shows that the piston is in the upper stop position of the compressing t stroke where the valve can be adjusted A tight rocking arm means thar the piston is in the lower stop position of the compressing stroke In this case continuously turn the T key clock wise for 360 degrees until the alignment of thos...

Page 20: ...ervior This should be the major project of your regular inspection 3 check the front brake lining for its worm depth if its worn depth is up to the limited mark replace the brake lining if the lining doesn t have limited mark but a concave slot as the figure replace the lining while its worn depth up to the bottom of concave slot replacement of a pair of linings shall be conducted sumultaneously d...

Page 21: ...en regulation is needed Ioosen the rear axle nut 2 Turn the chail adjusting nuts on the left and right sides to adjust the tension of the chain and to align the marking of the chain adjuster with the engraved lines in the similar position on both sides 3 Tighten the lock nut and rear axke nut by a torque of 35 50Nm 4 Repetitively check the tension of the chain 5 When the rear wheel is changed in p...

Page 22: ...in 1 Shut off the engine 2 Add some machine oil or chain grease to the driving chain Attention When the rear wheel axil has moved to the back adjusting limit if excess loose be cause of wearing to the driving chain please change with a new one ...

Page 23: ...t pipe Fuel tank and lower portion of cushion Carburetor Head lock and ignition switch Meters 1 After pre wiping the vehicle should be washed with clean water to remove dirty residues so as to prevent corrosion Plastic subassemblies should be cleaned by wiping with cloth or foam soaked in neutral detergent solution followed by washing with clean water 2 After the cleaned vehicle is air dried greas...

Page 24: ...and even explosion under certain conditions Therefore do not smoke make fire or have any fire left behind on draining off fuel 3 Take out the spark plug pour about 15 20ml of clean engine oil into the cylinder step down the kick lever repectitively for several step down the kick lever repetitively for several times so as to have machine oil distributed all over the engine and finally fit the spark...

Page 25: ...d check ups must be made It is better to drive it at a low speed in a place of traffic safety to test its performance before normal drive Table of Torque for Fasteners Ser No Fastener Torque N m 1 Front wheel axe nut 35 45 2 Rear wheel axle nut 50 60 3 Nut for tightening upper joining plate of front fork with vertical tube 40 50 4 Nut for fixing engine 20 25 5 Rear arm nut 35 50 6 Exhaust silencer...

Page 26: ...e needed C means Cleaning is needed R means Replacement is needed A menas Adjustment is needed L means Lubrication is needed means This item of maintenance should be carried out at a service centre It may be also done by the user himself with reference to this manual provided he has special tools spare parts and is capable of this job means This item can only be carried out by the serviceman at pr...

Page 27: ...ubriating oil screen R yearly C Tension of chain A A A A Ldling speed of carbureor I I I I Driving chain I L I L I L I L Baliery Monthty I I I Wear of brake shoers I I I I Rear braking systems I I I I Brakint liquid hose R 4year I I I I Also for disc style Cup of braking liquic I I I I Braking licud R 2year One replacement every two year Front braking system I I I I Rear braking light swrtch I I I...

Page 28: ...25 V ELECTRICAL DIAGRAM ...

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