2009 YAMAHA AEROX50 coolant

PERIODIC MAINTENANCE AND ADJUSTMENT
6-25
6Engine 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 hissingsound 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 coolantas 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.
U3C6E1E0.book Page 25 Friday, August 8, 2008 10:09 AM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
1818 mm (71.6 in)
Overall width:
719 mm (28.3 in)
Overall height:
1170 mm (46.1 in)
Seat height:
828 mm (32.6 in)
Wheelbase:
1256 mm (49.4 in)
Ground clearance:
148 mm (5.83 in)
Minimum turning radius:
1800 mm (70.9 in)Weight:With oil and fuel:
97.0 kg (214 lb)Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49.0 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)
Compression ratio:
7.90 :1
Starting system:
Electric starter and kickstarter
Lubrication system:
Separate lubrication (Yamaha autolube)
Engine oil:Type:
YAMALUBE 2 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)Carburetor:Manufacturer:
GURTNER
Type × quantity:
PY 12 x 1Spark plug (s):Manufacturer/model:
NGK/BR8HSSpark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:Clutch type:
Dry, centrifugal automaticTransmission:Primary reduction system:
Helical gear
Primary reduction ratio:
52 × 13 (4.000)
Secondary reduction system:
Spur gear
Secondary reduction ratio:
43 × 14 (3.070)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic typeChassis:Frame type:
Steel tube underbone
Caster angle:
27.00 °
Trail:
90.0 mm (3.54 in)Front tire:Type:
Tubeless
Size:
130/60-13 53L (MICHELIN), 53P (PIRELLI)
Manufacturer/model:
MICHELIN / PILOT SPORT
Manufacturer/model:
PIRELLI / EVO21
U3C6E1E0.book Page 1 Friday, August 8, 2008 10:09 AM

SPECIFICATIONS
8-2
8
Rear tire:Type:
Tubeless
Size:
140/60-13 57L (MICHELIN), 53P (PIRELLI)
Manufacturer/model:
MICHELIN / PILOT SPORT
Manufacturer/model:
PIRELLI / EVO22Loading:Maximum load:
180 kg (397 lb)
(Total weight of rider, passenger, cargo and
accessories)Tire air pressure (measured on cold
tires):Loading condition:
0–90 kg (0–198 lb)
Front:
150 kPa (1.50 kgf/cm², 22 psi)
Rear:
150 kPa (1.50 kgf/cm², 22 psi)
Loading condition:
90–180 kg (198–397 lb)
Front:
160 kPa (1.60 kgf/cm², 23 psi)
Rear:
170 kPa (1.70 kgf/cm², 25 psi)Front wheel:Wheel type:
Cast wheel
Rim size:
13xMT3.00
Rear wheel:Wheel type:
Cast wheel
Rim size:
13xMT3.50Front brake:Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 3 or 4Rear brake:Type:
Single disc brake
Operation:
Left hand operation
Recommended fluid:
DOT 3 or 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
80.0 mm (3.15 in)Rear suspension:Type:
Unit swing
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
70.0 mm (2.76 in)
Electrical system:Ignition system:
DC. CDI
Charging system:
AC magnetoBattery:Model:
CB4-LB(GS), YB4L-B(YUASA)
Voltage, capacity:
12 V, 4.0 AhHeadlight:Bulb type:
IncandescenceBulb voltage, wattage × quantity:Headlight:
12 V, 35 W/35.0 W × 1
Tail/brake light:
12 V, 21.0 W/5.0 W × 1
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Meter lighting:
12 V, 1.7 W × 2
High beam indicator light:
12 V, 1.7 W × 1
Oil level warning light:
12 V, 1.7 W × 1
Turn signal indicator light:
12 V, 1.7 W × 1
Coolant temperature warning light:
12 V, 1.7 W × 1
U3C6E1E0.book Page 2 Friday, August 8, 2008 10:09 AM

INDEXAAcceleration and deceleration................. 5-2
Air filter element, cleaning..................... 6-10BBattery................................................... 6-19
Brake fluid, changing ............................ 6-16
Brake fluid level, checking .................... 6-15
Brake lever, front..................................... 3-5
Brake lever, rear ..................................... 3-5
Brake levers, lubricating........................ 6-16
Braking .................................................... 5-2CCarburetor,adjusting ............................. 6-11
Care ........................................................ 7-1
Catalytic converters ................................ 3-7
Centerstand, checking and
lubricating ........................................... 6-17
Coolant.................................................... 6-9
Coolant temperature warning light .......... 3-2
Cowling and panel, removing and
installing................................................ 6-6DDimmer switch ........................................ 3-4EEngine break-in ....................................... 5-3
Engine oil ................................................ 3-8FFinal transmission oil .............................. 6-8
Front and rear brake lever free play,
checking ............................................. 6-14
Front and rear brake pads, checking .... 6-14
Front fork, checking .............................. 6-17
Fuel ......................................................... 3-6
Fuel consumption, tips for reducing ........ 5-3Fuel gauge.............................................. 3-4
Fuel tank cap .......................................... 3-5
Fuse, replacing ..................................... 6-20
HHandlebar switches ................................ 3-4
Headlight bulb, replacing ...................... 6-21
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-4IIdentification numbers ............................ 9-1
Indicator and warning lights .................... 3-2KKey identification number ....................... 9-1
Kickstarter............................................... 3-9MMain switch/steering lock........................ 3-1
Model label ............................................. 9-2OOil level warning light.............................. 3-2PParking ................................................... 5-4
Part locations .......................................... 2-1
Periodic maintenance and lubrication
chart ..................................................... 6-2RRider seat ............................................... 3-9SSafe-riding points.................................... 1-5
Safety information................................... 1-1
Shock absorber assembly, adjusting
(if equipped) ....................................... 3-11
Spark plug, checking .............................. 6-7
Specifications ......................................... 8-1
Speedometer unit ................................... 3-3Starting a cold engine ............................. 5-1
Starting off ............................................... 5-2
Start switch.............................................. 3-4
Steering, checking................................. 6-18
Storage.................................................... 7-3
Storage compartments .......................... 3-10
TTachometer (if equipped) ........................ 3-3
Tail/brake light bulb, replacing .............. 6-22
Throttle cable free play, checking ......... 6-11
Throttle grip and cable, checking and
lubricating ........................................... 6-16
Tires ...................................................... 6-12
Troubleshooting .................................... 6-23
Troubleshooting charts.......................... 6-24
Turn signal indicator light ........................ 3-2
Turn signal light bulb, replacing ............ 6-22
Turn signal switch ................................... 3-4VVehicle identification number .................. 9-1WWheel bearings, checking ..................... 6-18
Wheels .................................................. 6-13
U3C6E1E0.book Page 1 Friday, August 8, 2008 10:09 AM