
6-26
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EAU17226
PERIODIC MAINTENANCE AND MINOR REPAIREngine overheating
EWAT1040
w● ●● ●
●
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.
● ●● ●
●
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.
NOTE:
If 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 NOTE.)
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.
15P-F8199-E0_ch6.pmd2007/06/21, 11:09 26

8-1
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SPECIFICATIONS
Specifications
EAU26320
SPECIFICATIONS
DimensionsOverall length
1915 mm (75.4 in)
Overall width
695 mm (27.4 in)
Overall height
1040 mm (40.9 in)
Seat height
750 mm (29.5 in)
Wheelbase
1280 mm (50.4 in)
Ground clearance
115 mm (4.53 in)
Minimum turning radius
2000 mm (78.7 in)WeightWith oil and fuel
93.0 kg (205 lb)EngineEngine type
Liquid cooled 4-stroke, SOHC
Cylinder arrangement
Forward-inclined single cylinder
Displacement
49.0 cm
3
Bore x stroke
38.0 x 43.6 mm (1.50 x 1.72 in)
Compression ratio
12.00 :1
Starting system
Electric starter and kickstarter
Lubrication system
Wet sump
Engine oilType
SAE10W40
-10 0 10 20 30
40 -20
50
˚C
SAE 10W-30
SAE 10W-40
SAE 15W-40SAE 20W-40SAE 20W-50
Recommended engine oil grade
API service SG type or higher, JASO
standard MA
Periodic oil change
0.78 L (0.82 US qt) (0.69 Imp.qt)Final transmission oilType
SAE10W30 type SE motor oil
Quantity
0.10 L (0.11 US qt) (0.09 Imp.qt)Cooling systemCoolant reservoir capacity (up to the maxi-
mum level mark)
0.26 L (0.27 US qt) (0.23 Imp.qt)
Radiator capacity (including all routes)
0.50 L (0.53 US qt) (0.44 Imp.qt)Air filterAir filter element
Wet element”FuelRecommended fuel
Regular unleaded gasoline onlyFuel tank capacity
4.5 L (1.19 US gal) (0.99 Imp.gal)
Throttle bodyType/quantity
3B31 00(SE AC19-1) / 1
Manufacturer
MIKUNI”Spark plug (s)Manufacturer/model
NGK/CR7E
Spark plug gap
0.7-0.8 mm (0.028-0.031 in)ClutchClutch type
Dry, centrifugal automaticTransmissionPrimary reduction system
Helical gear
Primary reduction ratio
50/13 (3.846)
Secondary reduction system
Helical gear
Secondary reduction ratio
43/12 (3.583)
Transmission type
V-belt automatic
Operation
Centrifugal automatic typeChassisFrame type
Steel tube backbone
Caster angle
26.00 degree
15P-F8199-E0_ch8.pmd2007/07/18, 12:26 1

8-2
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SPECIFICATIONSTrail
84.0 mm (3.31 in)Front tireType
Tubeless
Size
120/90-10 57J
Manufacturer/model
CHENG SHIN / C-6022Rear tireType
Tubeless
Size
120/90-10 57J
Manufacturer/model
CHENG SHIN / C-6022
Maximum load
177 kg (390 lb)Tire air pressure (measured on cold
tires)Front
175 kPa (25 psi) (1.75 kgf/cm
2) (1.75 bar)
Rear
175 kPa (25 psi) (1.75 kgf/cm2) (1.75 bar)
Front wheelWheel type
Cast wheel
Rim size
10 x 3.00Rear wheelWheel type
Cast wheel
Rim size
10 x 3.00
Front brakeType
Drum brake
Operation
Right hand operationRear brakeType
Drum brake
Operation
Left hand operationFront suspensionType
Telescopic fork
Spring/shock absorber type
Coil spring
Wheel travel
65.0 mm (2.56 in)Rear suspensionType
Unit swing
Spring/shock absorber type
Coil spring
Wheel travel
56.0 mm (2.20 in)Electrical systemIgnition system
Transistorized coil ignition
Charging system
AC magnetoBatteryModel
GTX5L-BSVoltage, capacity
12 V, 4.0 Ah
HeadlightBulb type
Halogen bulbBulb voltage, wattage x quantityHeadlight
12 V, 35 W/35.0 W x 1
Tail/brake light
12 V, 5.0 W/21.0 W x 1
Front turn signal light
12 V, 10.0 W x 2
Rear turn signal light
12 V, 10.0 W x 2
License plate light (15P3/15P4)
12 V, 5.0 W x 1
Meter lighting
12 V, 1.7 W x 1
High beam indicator light
12 V, 1.7 W x 1
Turn signal indicator light
14 V, 3.0 W x 1
Coolant temperature warning light
12 V, 1.7 W x 1
Engine trouble warning light
12 V, 1.7 W x 1FusesMain fuse
15.0 A
15P-F8199-E0_ch8.pmd2007/07/18, 12:26 2

INDEX
AAcceleration and deceleration ................. 5-2
Air filter element, replacing .................... 6-12BBattery.................................................... 6-20
Brake lever free play, adjusting .............. 6-15
Brake lever, front ...................................... 3-6
Brake lever, rear ....................................... 3-6
Brake levers, lubricating......................... 6-17
Brake shoes, checking ........................... 6-16
Braking..................................................... 5-2CCare .......................................................... 7-1
Catalytic converter ................................... 3-8
Centerstand, checking and lubricating .. 6-18
Coolant................................................... 6-10
Coolant temperature warning light ........... 3-3DDimmer switch.......................................... 3-5EEngine break-in........................................ 5-3
Engine oil................................................. 6-7
Engine trouble warning light .................... 3-3FFinal transmission oil............................... 6-9
Front fork, checking............................... 6-18
Fuel .......................................................... 3-7
Fuel gauge............................................... 3-4
Fuel tank cap........................................... 3-6
Fuse, replacing ...................................... 6-21HHandlebar switches .................................. 3-5
Headlight bulb, replacing....................... 6-22
Helmet holder........................................... 3-9High beam indicator light ......................... 3-3
Horn switch .............................................. 3-5
IIdentification numbers.............................. 9-1
Indicator and warning lights ..................... 3-2KKey identification number ......................... 9-1
Keyhole cover ........................................... 3-2
Kickstarter ................................................ 3-8LLuggage hook.......................................... 3-9MMain switch/steering lock ......................... 3-1
Maintenance, periodic .............................. 6-1
Model label............................................... 9-2PPanels, removing and installing............... 6-5
Parking..................................................... 5-3
Part locations........................................... 2-1
Periodic maintenance and lubrication
chart ....................................................... 6-2
Pre-operation check list ........................... 4-2RRear brake lever free play, adjusting ..... 6-16SSafe-riding points ..................................... 1-4
Safety information .................................... 1-1
Seat.......................................................... 3-9
Spark plug, checking ............................... 6-6
Specifications........................................... 8-1
Speedometer unit..................................... 3-4
Start switch .............................................. 3-5
Starting off ................................................ 5-2
Starting the engine ................................... 5-1Steering, checking ................................. 6-19
Storage ..................................................... 7-3
Storage compartment ............................ 3-10
TTail/brake light bulb, replacing................ 6-23
Throttle cable free play, checking .......... 6-12
Throttle grip and cable, checking and
lubricating............................................ 6-17
Tires ....................................................... 6-13
Troubleshooting...................................... 6-24
Troubleshooting charts ........................... 6-25
Turn signal indicator light......................... 3-3
Turn signal light bulb, replacing............. 6-24
Turn signal switch ..................................... 3-5VValve clearance ...................................... 6-12
Vehicle identification number ................... 9-1WWheel bearings, checking ...................... 6-19
Wheels................................................... 6-15
15P-F8199-E0_ch9ind.pmd2007/06/16, 16:02 3