2013 YAMAHA AEROX50 coolant

PERIODIC MAINTENANCE AND ADJUSTMENT
6-27
6 Engine overheating
WARNING
EWA10400
●
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
●
After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissing
sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
U1PHE0E0.book Page 27 Wednesday, August 29, 2012 4:42 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
1870 mm (73.6 in)
Overall width:
NS50 700 mm (27.6 in)
NS50N 725 mm (28.5 in)
Overall height:
NS50 1155 mm (45.5 in)
NS50N 1115 mm (43.9 in)
Seat height:
815/930 mm (32.1/36.6 in)
Wheelbase:
1275 mm (50.2 in)
Ground clearance:
130 mm (5.12 in)
Minimum turning radius:
2000 mm (78.7 in)Weight:Curb weight:
97 kg (214 lb)Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Single cylinder
Displacement:
49 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)
Compression ratio:
11.50–12.50 : 1
Starting system:
Electric starter and kickstarterLubrication system:
Separate lubrication (Yamaha autolube)
Engine oil:Type:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade) or (ISO EG-C or EG-D
grade)
Engine oil quantity:
Quantity:
1.40 L (1.48 US qt, 1.23 Imp.qt)Final transmission oil:Type:
SAE 10W-30 type SE motor oil
Quantity:
0.11 L (0.12 US qt, 0.10 Imp.qt)Cooling system:Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes):
1.20 L (1.27 US qt, 1.06 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
7.0 L (1.85 US gal, 1.54 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)Carburetor:Type × quantity:
PHVA 12 ZS x 1
Spark plug(s):Manufacturer/model:
NGK/BR8HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Dry, centrifugal automaticTransmission:Primary reduction ratio:
1
Final drive:
Gear
Secondary reduction ratio:
52/13 × 43/14 (12.286)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic typeChassis:Frame type:
Underbone
Caster angle:
27.00 °
Trail:
87 mm (3.4 in)Front tire:Type:
Tubeless
Size:
120/70-13 53P(Michelin)
53L(SAVA,Metzeler)
Manufacturer/model:
MICHELIN/POWER PURE SC
U1PHE0E0.book Page 1 Wednesday, August 29, 2012 4:42 PM

SPECIFICATIONS
8-3
8
High beam indicator light:
LED
Oil level warning light:
LED
Turn signal indicator light:
LED
Fuel level warning light:
LED
Coolant temperature warning light:
LEDFuses:Main fuse:
7.5 A
U1PHE0E0.book Page 3 Wednesday, August 29, 2012 4:42 PM

INDEX22-stroke engine oil................................. 3-10AAcceleration and deceleration................. 5-2
Air filter element, cleaning..................... 6-10
Auxiliary light bulb, replacing
(if equipped)........................................ 6-24BBattery................................................... 6-19
Brake fluid, changing ............................ 6-16
Brake fluid level, checking .................... 6-15
Brake lever, front..................................... 3-7
Brake lever, rear ..................................... 3-7
Brake levers, lubricating........................ 6-17
Braking .................................................... 5-2CCarburetor,adjusting ............................. 6-11
Care ........................................................ 7-1
Catalytic converter ................................ 3-10
Centerstand, checking and
lubricating ........................................... 6-17
Coolant.................................................... 6-9
Coolant temperature warning light .......... 3-3
Cowling and panel, removing and
installing................................................ 6-6DDimmer switch ........................................ 3-7EEngine break-in ....................................... 5-3FFinal transmission oil .............................. 6-8
Front and rear brake lever free play,
checking ............................................. 6-14
Front and rear brake pads, checking .... 6-15Front fork, checking .............................. 6-18
Fuel......................................................... 3-9
Fuel and 2-stroke engine oil tank caps ... 3-8
Fuel consumption, tips for reducing........ 5-3
Fuel level warning light ........................... 3-3
Fuse, replacing ..................................... 6-21
HHandlebar switches ................................ 3-6
Headlight bulb, replacing ...................... 6-22
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-7IIdentification numbers ............................ 9-1
Indicator lights and warning light ............ 3-2KKickstarter............................................. 3-11LLicense plate light ................................. 6-24MMain switch/steering lock........................ 3-1
Maintenance and lubrication, periodic .... 6-3
Maintenance, emission control
system .................................................. 6-2
Matte color, caution ................................ 7-1
Model label ............................................. 9-1
Multi-function display (NS50).................. 3-4OOil level warning light.............................. 3-2PParking ................................................... 5-4
Part locations .......................................... 2-1SSafe-riding points.................................... 1-5
Safety information................................... 1-1Seats ..................................................... 3-11
Shock absorber assembly,
adjusting (if equipped) ........................ 3-13
Spark plug, checking ............................... 6-7
Specifications .......................................... 8-1
Speedometer unit (NS50N) ..................... 3-3
Starting a cold engine ............................. 5-1
Starting off ............................................... 5-2
Start switch.............................................. 3-7
Steering, checking................................. 6-19
Storage.................................................... 7-3
Storage compartment............................ 3-12
TTail/brake light bulb, replacing .............. 6-23
Throttle grip and cable, checking and
lubricating ........................................... 6-17
Throttle grip free play, checking ............ 6-11
Tires ...................................................... 6-12
Troubleshooting .................................... 6-25
Troubleshooting charts.......................... 6-26
Turn signal indicator light ........................ 3-2
Turn signal light bulb, replacing ............ 6-23
Turn signal switch ................................... 3-7VVehicle identification number .................. 9-1WWheel bearings, checking ..................... 6-19
Wheels .................................................. 6-14
U1PHE0E0.book Page 1 Wednesday, August 29, 2012 4:42 PM