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Periodic maintenance and adjustment
6-15
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2
3
4
56
7
8
9
10
11
12
TIPThe coolant should be between theminimum and maximum level marks.
4. If the coolant is at or below the minimum level mark, remove the
reservoir cap. (See page 3-11.)
WARNING! Remove only the
coolant reservoir cap. Never at-
tempt to remove the radiator
cap when the engine is
hot.
[EWA15162]
5. Add coolant or distilled water toraise the coolant to the maximum
level mark, and install the coolant
reservoir cap and the panel.
NOTICE: If coolant is not avail- able, use distilled water or soft
tap water instead. Do not use
hard water or salt water since it
is harmful to the engine. If water
has been used instead of cool-
ant, replace it with coolant as
soon as possible, otherwise the
cooling system will not be pro-
tected against frost and corro-
sion. If water has been added to
the coolant, have a Yamaha
dealer check the antifreeze con-
tent of the coolant as soon as
possible, otherwise the effec-
tiveness of the coolant will be
reduced.
[ECA10473]
6. Close the seat.
EAU33032
Changing the coolant
The coolant must be changed at the in-
tervals specified in the periodic mainte-
nance and lubrication chart. Have a
Yamaha dealer change the coolant.
WARNING! Never attempt to remove
the radiator cap when the engine is
hot.
[EWA10382]
1. Maximum level mark
2. Minimum level mark
12
Coolant reservoir capacity:
0.25 L (0.26 US qt, 0.22 Imp.qt)
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Page 74 of 84

8-1
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5
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78
9
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12
Specifications
EAU72940
Dimensions:Overall length: 1990 mm (78.3 in)
Overall width: 690 mm (27.2 in)
Overall height: 1135 mm (44.7 in)
Seat height:
785 mm (30.9 in)
Wheelbase: 1385 mm (54.5 in)
Ground clearance: 140 mm (5.51 in)Weight:Curb weight:142 kg (313 lb)Engine:Combustion cycle:
4-stroke
Cooling system: Liquid cooled
Valve train: SOHC
Number of cylinders:
Single cylinder
Displacement: 155 cm
3
Bore stroke:
58.0 58.7 mm (2.28 2.31 in)
Compression ratio:
11.0 : 1
Starting system: Electric starter Lubrication system:
Wet sump
Engine oil:Recommended brand:YAMALUBE
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:1.10 L (1.16 US qt, 0.97 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)
Coolant reservoir (up to the maximum level
mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator (including all routes):
0.56 L (0.59 US qt, 0.49 Imp.qt)Air filter:Air filter element:Oil-coated paper element
V-belt filter element:
Dry elementFuel:Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity:
8.0 L (2.1 US gal, 1.8 Imp.gal)
Fuel injection:Throttle body: ID mark:52S1 01Spark plug(s):Manufacturer/model: NGK / CPR9EA-9
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: 10.320 (46 / 13 )×(35 / 12)
Transmission type:
V-belt automatic
Gear ratio:Chassis:Frame type: Underbone
Caster angle: 23.8
Trail:
84 mm (3.3 in)Front tire:Type:Tubeless
Size:
100 / 80 - 16M/C 50P
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Specifications
8-2
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Manufacturer/model: DURO / DM1157FRear tire:Type:Tubeless
Size: 120 / 80 - 16M/C 60P
Manufacturer/model:
DURO / DM1157Loading:Maximum load:179 kg (395 lb)
* (Total weight of rider, passenger, cargo
and accessories)Tire air pressure (measured on cold
tires):Loading condition:90 kg (198 lb)
Front: 175 kPa (1.75 kgf/cm
2, 25 psi)
Rear: 200 kPa (2.00 kgf/cm2, 29 psi)
Loading condition:
90 kg - maximum load
Front: 175 kPa (1.75 kgf/cm2, 25 psi)
Rear: 225 kPa (2.25 kgf/cm2, 33 psi)
Front wheel:Wheel type:Cast wheel
Rim size: J 16M/C × MT2.50
Rear wheel:Wheel type:Cast wheel
Rim size: J 16M/C × MT2.75Front brake:Type:
Hydraulic single disc brake
Specified brake fluid: DOT 4Rear brake:Type:
Mechanical leading trailing drum brakeFront suspension:Type:Telescopic fork
Spring:
Coil spring
Shock absorber: Hydraulic damper
Wheel travel: 100 mm (3.9 in)Rear suspension:Type:Unit swing
Spring: Coil spring
Shock absorber:
Gas-hydraulic damper
Wheel travel: 92 mm (3.6 in)Electrical system:System voltage:
12 V Ignition system:
TCI
Charging system:
AC magneto
Battery:Model:GT7B-4
Voltage, capacity:
10 V, 6.5 Ah (10 HR)Headlight:Bulb type:Halogen bulbBulb voltage, wattage quantity:Headlight:
12 V, 55.0 W 2
Brake/tail light: LED
Front turn signal light:
12 V, 10.0 W 2
Rear turn signal light: 12 V, 10.0 W 2
Auxiliary light: 12 V, 5.0 W 2
License plate light:
12 V, 5.0 W 1
Meter lighting: LED
High beam indicator light: LED
Turn signal indicator light:
LED
Coolant temperature warning light: LED
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