2015 YAMAHA MAJESTY S 125 transmission

TABLE OF CONTENTS SAFETY INFORMATION.................. 1-1
Further safe-riding points................. 1-5
DESCRIPTION ................................... 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instrument s................. 2-3
INSTRUMENT AND CONTROL
FUNCTIONS ....................................... 3-1
Main switch/steering lock................. 3-1
Keyhole cover .................................. 3-2
Indicator lights and warning lights ... 3-2
Tachometer ..................................... 3-3
Fuel gauge....................................... 3-4
Multi-function display ....................... 3-4
Handlebar switches ......................... 3-6
Front brake lever ............................. 3-7
Rear brake lever .............................. 3-7
Fuel tank cap ................................... 3-8
Fuel.................................................. 3-8
Fuel tank breather hose and overflow hose ............................................. 3-9
Catalytic converter ......................... 3-10
Seat ............................................... 3-10
Passenger footrest ........................ 3-11
Helmet holder ................................ 3-11
Storage compartments .................. 3-12
Shock absorber assembly ............. 3-13
Luggage hook ................................ 3-14
Sidestand....................................... 3-14 Ignition circuit cut-
off system ......... 3-15
FOR YOUR SAFETY – PRE-OPERATION
CHECKS ............................................ 4-1
OPERATION AND IMPORTANT RIDING
POINTS .............................................. 5-1
Starting the engine .......................... 5-1
Starting off ....................................... 5-2
Acceleration and deceleration ......... 5-2
Braking ............................................ 5-3
Tips for reducing fuel consumption ................................ 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT ................................... 6-1
Owner’s tool kit................................ 6-2
Periodic maintenance chart for the
emission control system .............. 6-4
General maintenance and lubrication chart ............................................. 6-5
Removing and installing panels ...... 6-8
Checking the spark plug.................. 6-9
Engine oil and oil strainer .............. 6-10
Final transmission oil..................... 6-12
Coolant .......................................... 6-13
Air filter and V-belt case air filter elements .................................... 6-15 Checking the engine idling
speed............ ............................ .. 6-16
Checking the throttle grip free play ............................................. 6-17
Valve clearance ............................. 6-17
Tires ............................................... 6-17
Cast wheels ................................... 6-19
Checking the front and rear brake
lever free play ............................. 6-20
Checking the front and rear brake pads............................................ 6-20
Checking the brake fluid level ........ 6-21
Changing the brake fluid ............... 6-22
Checking and lubricating the cables ......................................... 6-22
Checking and lubricating the throttle grip and cable ............................. 6-22
Lubricating the front and rear brake levers .......................................... 6-23
Checking and lubricating the
centerstand and sidestand ......... 6-23
Checking the front fork................... 6-24
Checking the steering .................... 6-25
Checking the wheel bearings......... 6-25
Battery ........................................... 6-25
Replacing the fuses ....................... 6-27
Replacing the headlight bulb ......... 6-28
Tail/brake light ............................... 6-28
Front turn signal light ..................... 6-28
Replacing a rear turn signal light bulb............................................. 6-29



4-1
1
2
34
5
6
7
8
9
FOR YOUR SAFETY – PRE-OPERATION CHECKS
EAU15598
Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
WARNING
EWA11152
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided inthis manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel Check fuel level in fuel tank.
Refuel if necessary.
Check fuel line for leakage.
Check fuel tank breather hose and overflow hose for obstructions, cracks or
damage, and check hose connections. 3-8, 3-9
Engine oil Check oil level in engine.
If necessary, add recommended oil to specified level.
Check vehicle for oil leakage. 6-10
Final transmission oil Check vehicle for oil leakage. 6-12
Coolant Check coolant level in reservoir.
If necessary, add recommended coolant to specified level.
Check cooling system for leakage. 6-13
Front brake Check operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add specified brake fluid to specified level.
Check hydraulic system for leakage. 6-20, 6-21



OPERATION AND IMPORTANT RIDING POINTS
5-4
2
3
456
7
8
9
150–500 km (90–300 mi)
Avoid prolonged operation above 1/2
throttle.
500–1000 km (300–600 mi)
Avoid prolonged operation above 3/4
throttle.
NOTICE: After 1000 km (600
mi) of operation, be sure to change
the engine oil and final transmission
oil, and to clean the oil strain-
er.
[ECA16502]
1000 km (600 mi) and beyond
Avoid prolonged full-throttle operation.
Vary the engine speed occasionally.NOTICE
ECA10271
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealercheck the vehicle.
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312

Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.

Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.

Do not park near grass or other
flammable materials whichmight catch fire.



PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
2
3
4
567
8
9
12 * Steering bearings Check bearing play and steering
for roughness. √√√√√
Lubricate with lithium-soap-based grease. Every 50000 km (30000 mi)
13 * Chassis fasteners Make sure that all nuts, bolts and
screws are properly tightened. √√√√√
14 Front brake lever
pivot shaft Lubricate with silicone grease.
√√√√√
15 Rear brake lever
pivot shaft Lubricate with silicone grease.
√√√√√
16 Sidestand,
centerstand Check operation.
Lubricate with lithium-soap-based
grease. √√√√√
17 * Sidestand switch Check operation. √√√√√√
18 * Front fork Check operation and for oil
leakage. √√√√
19 * Shock absorber
assembly Check operation and shock
absorber for oil leakage. √√√√
20 Engine oil Change. (See pages 3-5 and
6-10.) √When the oil change indicator flas
hes (after the initial 1000 km
[600 mi] and every 3000 km (1800 mi) thereafter)
Check oil level and vehicle for oil leakage. √
Every 3000 km (1800 mi)
21 Engine oil strainer Clean. √Every 3000 km (1800 mi)
22 * Cooling system Check coolant level and vehicle
for coolant leakage. √√√√√
Change coolant. Every 3 years
23 Final transmission
oil Check vehicle for oil leakage.
√√ √
Change. √√√
24 * V-belt Replace. Every 20000 km (12500 mi)
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 24000 km
(14000 mi)



PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
2
3
4
567
8
9
their specified torques.
8. Refill with the specified amount of the recommended engine oil, and
then install and tighten the oil filler
cap.
NOTICE
ECA11671

Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.

Be sure no foreign material en-ters the crankcase.
9. Start the engine, and then let it idle for several minutes while checking it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
10. Turn the engine off, and then check the oil level and correct it if
necessary.
11. Reset the oil change indicator and oil change tripmeter. (See
page 3-4.)
EAU20067
Final transmission oilThe final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the
scooter. In addition, the final transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart.1. Start the engine, warm up the final transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the center- stand.
3. Place an oil pan under the final transmission case to collect the
used oil.
4. Remove the final transmission oil filler cap and its O-ring from the fi-
nal transmission case.
Tightening torque:Engine oil drain bolt A:20 Nm (2.0 m·kgf, 14 ft·lbf)
Engine oil drain bolt B: 32 Nm (3.2 m·kgf, 23.1 ft·lbf)
Recommended engine oil: See page 8-1.
Oil change quantity: 0.95 L (1.00 US qt, 0.84 Imp.qt)



PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
1
2
3
4
56
7
8
95. Remove the final transmission oil
drain bolt and its gasket to drain
the oil from the final transmission
case.
6. Install the final transmission oil drain bolt and its new gasket, and then tighten the bolt to the speci-
fied torque.
7. Refill with the specified amount of the recommended final transmis-
sion oil. WARNING! Make sure
that no foreign material enters
the final transmission case.
Make sure that no oil gets on the
tire or wheel.
[EWA11312]
8. Install the final transmission oil fill- er cap and its new O-ring, and then
tighten the oil filler cap.
9. Check the final transmission case for oil leakage. If oil is leaking,
check for the cause.
EAU20071
CoolantThe coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUT1525
To check the coolant level
The coolant level should be checked as
follows before each ride. In addition,
the coolant must be changed at the in-
tervals specified in the periodic mainte-
nance and lubrication chart.1. Place the vehicle on the center- stand.TIP
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.

Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
2. Check the coolant level in the cool- ant reservoir.
1. Final transmission oil filler cap
1. Final transmission oil drain bolt
1
1
Tightening torque:Final transmission oil drain bolt: 20 Nm (2.0 m·kgf, 14 ft·lbf)
Recommended final transmission
oil: See page 8-1.
Oil quantity:
0.20 L (0.21 US qt, 0.18 Imp.qt)



8-1
2
3
4
5
6
789
SPECIFICATIONS
EAU5091K
Dimensions:Overall length:2030 mm (79.9 in)
Overall width: 715 mm (28.1 in)
Overall height: 1295 mm (51.0 in)
Seat height:
795 mm (31.3 in)
Wheelbase: 1405 mm (55.3 in)
Ground clearance: 93 mm (3.66 in)
Minimum turning radius:
2100 mm (82.7 in)Weight:Curb weight:148 kg (326 lb)Engine:Engine type:Liquid cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement:
125 cm
3
Bore × stroke:
52.0 × 58.7 mm (2.05 × 2.31 in)
Compression ratio: 11.0 : 1
Starting system:
Electric starter
Lubrication system: Wet sump
Engine oil:Type:
SAE 10W-40
Recommended engine oil grade: API service SG type or higher, JASO stan-
dard MA or MB
*Engine oil quantity: Periodic oil change:
0.95 L (1.00 US qt, 0.84 Imp.qt)Final transmission oil:Type:SAE 10W-30 type SE motor oil
Quantity:
0.20 L (0.21 US qt, 0.18 Imp.qt)Cooling system:Coolant reservoir capacity (up to the maxi-
mum level mark):0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes): 0.56 L (0.59 US qt, 0.49 Imp.qt)
Air filter:Air filter element:Oil-coated paper elementFuel:Recommended fuel:Regular unleaded gasoline
Fuel tank capacity:
7.4 L (1.96 US gal, 1.63 Imp.gal)Fuel injection:*Throttle body:ID mark:52S1 01Spark plug(s):Manufacturer/model:
NGK / CPR8EA
Spark plug gap: 0.8–0.9 mm (0.031–0.035 in)Clutch:Clutch type:
Dry, centrifugal automaticTransmission:Primary reduction ratio:1.000
Final drive:
Gear
Secondary reduction ratio: 8.787 (45 / 13 × 33 / 13)
Transmission type: V-belt automaticChassis:Frame type:Backbone
Caster angle: 26.00 °
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50



INDEXAAcceleration and deceleration....................5-2
Air filter and V-belt case air filter
elements ................................................6-15
Auxiliary light ............................................6-30BBattery......................................................6-25
Brake fluid, changing ...............................6-22
Brake fluid level, checking .......................6-21
Brake lever, front........................................3-7
Brake lever, rear ........................................3-7
Brake levers, lubricating...........................6-23
Braking .......................................................5-3CCables, checking and lubricating .............6-22
Care ...........................................................7-1
Catalytic converter ...................................3-10
Centerstand and sidestand, checking and
lubricating ..............................................6-23
Coolant.....................................................6-13
Coolant temperature warning light .............3-3DDimmer switch ...........................................3-7EEngine break-in ..........................................5-3
Engine idling speed, checking .................6-16
Engine oil .................................................6-10
Engine serial number .................................9-1
Engine trouble warning light.......................3-3FFinal transmission oil ...............................6-12
Front and rear brak e lever free play,
checking ................................................6-20
Front and rear brake pads, checking .......6-20 Front fork, checking ................................. 6-24
Front turn signal light ............................... 6-28
Fuel............................................................ 3-8
Fuel consumption, tips
for reducing........... 5-3
Fuel gauge................................................. 3-4
Fuel tank breather hose and overflow hose ........................................................ 3-9
Fuel tank cap ............................................. 3-8
Fuses, replacing ...................................... 6-27
HHandlebar switches ................................... 3-6
Headlight bulb, replacing ......................... 6-28
Helmet holder .......................................... 3-11
High beam indicator light ........................... 3-2
Horn switch ................................................ 3-7IIdentification numbers ............................... 9-1
Ignition circuit cut-off system ................... 3-15
Indicator lights and warning lights ............. 3-2KKeyhole cover ............................................ 3-2LLicense plate light bulb, replacing ........... 6-30
Luggage hook .......................................... 3-14MMain switch/steering lock........................... 3-1
Maintenance and lubrication, periodic ....... 6-5
Maintenance, emission control system...... 6-4
Matte color, caution ................................... 7-1
Model label ................................................ 9-1
Multi-function display ................................. 3-4PPanels, removing and installing ................. 6-8
Parking ...................................................... 5-4 Part locations ............................................ 2-1
Passenger footrest .................................. 3-11
Pass switch ............................................... 3-7
SSafe-riding points ...................................... 1-5
Safety information ..................................... 1-1
Seat ......................................................... 3-10
Shock absorber assembly ....................... 3-13
Sidestand ................................................ 3-14
Spark plug, checking ................................. 6-9
Specifications ............................................ 8-1
Starting off ................................................. 5-2
Starting the engine .................................... 5-1
Start switch................................................ 3-7
Steering, checking................................... 6-25
Storage...................................................... 7-4
Storage compartments ............................ 3-12TTachometer ............................................... 3-3
Tail/brake light ......................................... 6-28
Throttle grip and cable, checking and
lubricating ............................................. 6-22
Throttle grip free play, checking .............. 6-17
Tires ........................................................ 6-17
Tool kit....................................................... 6-2
Troubleshooting ...................................... 6-30
Troubleshooting charts............................ 6-32
Turn signal indicator lights ........................ 3-2
Turn signal light bulb (rear), replacing..... 6-29
Turn signal switch ..................................... 3-7VValve clearance....................................... 6-17
Vehicle identification number .................... 9-1