
EAUS1550
2-stroke engine oil
Make sure that there is sufficient 2-
stroke engine oil in the oil tank. Add
the recommended 2-stroke engine oil
as necessary.
The 2-stroke engine oil tank is located
under the seat. (See page 3-12).
1. 2-stroke engine oil tank
2. 2-stroke engine oil tank cap
1. Remove the 2-stroke engine oiltank cap by pulling it off. 2. Install the 2-stroke engine oil tank
cap by pushing it into the oil tank
opening.
TIP
Make sure that the 2-stroke engine oil
tank cap is properly installed before
riding the vehicle.
Recommended oil:See page 8-1
Oil quantity: 1.40 L (1.48 US qt, 1.23 Imp.qt)
INSTRUMENT AND CONTROL FUNCTIONS
3-10
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FOR YOUR SAFETY – PRE-OPERATION CHECKS
4-1
4
EAU15596
Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the ins-
pection and maintenance procedures and schedules described in the Owner’s Manual.
EWA11151
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment dama-
ge. Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures pro-
vided in this manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
WARNING
ITEMCHECKS PAGE
• Check fuel level in fuel tank.
Fuel • Refuel if necessary. 3-8
• Check fuel line for leakage.
• Check oil level in oil tank.
2-stroke engine oil • If necessary, add recommended oil to specified level. 3-10
• Check vehicle for oil leakage.
Transmission oil • Check oil level in transmission case.
• If necessary, add recommended oil to specified level. 6-13
• Check coolant level in reservoir.
Coolant • If necessary, add recommended coolant to specified level. 6-14
• Check cooling system for leakage.
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check brake pads for wear.
Front brake • Replace if necessary. 6-23, 6-24
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
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EAUS1591
Transmission oil
The transmission oil level should be
checked before each ride. In addition,
the oil must be changed at the inter-
vals specified in the periodic mainte-
nance and lubrication chart.
To check the transmission oil level
1. Transmission oil filler cap
2. Transmission oil check bolt
1. Remove cowling A. (See page 6-8).
2. Place the vehicle on a level surfa- ce and hold it in an upright posi-
tion.
TIP
Make sure that the vehicle is positio-
ned straight up when checking the oil
level. A slight tilt to the side can result
in a false reading.
3. Remove the oil check bolt, andthen check the oil level.
TIP
The oil should be at the brim of the
check hole.
4. If the oil is below the brim of thecheck hole, remove the oil filler
cap, add sufficient oil of the
recommended type to raise it to
the correct level, and then install
the oil filler cap.
5. Install the oil check bolt, and then tighten it to the specified torque. To change the transmission oil
1. Transmission oil check bolt
2. Transmission oil drain bolt
3. Washer
1. Place an oil pan under the trans-
mission oil case to collect the
used oil.
2. Remove the drain bolt and the oil check bolt to drain the oil.
3. Install the drain bolt and the check bolt, and then tighten them
to the specified torques.
Tightening torque:Oil check bolt: 6 Nm (0.6 m•kgf, 4.3 ft•lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6
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4. Remove the oil filler cap, refillwith the specified amount of the
recommended transmission oil,
and then install and tighten the oil
filler cap. NOTICE: Make sure
that no foreign material enters
the transmission case.
[ECAM1021]
5. Start the engine and let it idle for several minutes while checking
the transmission oil case for oil
leakage. If oil is leaking, imme-
diately turn the engine off and
check for the cause.
EAU20070
Coolant
The coolant level should be checked
before each ride. In addition, the coo-
lant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU39087
To check the coolant level1. Place the vehicle on a level surfa- ce and hold it in an upright posi-
tion.
TIP
The coolant level must be chec-
ked on a cold engine since the
level varies with engine tempera-
ture.
Make sure that the vehicle is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
2. Check the coolant level in thecoolant reservoir.
TIP
The coolant should be between the
minimum and maximum level marks.
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
3. If the coolant is at or below theminimum level mark, remove
panel A to access the coolant
reservoir. (See page 6-8).
4. Remove the coolant reservoir cap, add coolant to the maxi-
mum level mark, and then install
the reservoir cap. WARNING!
Remove only the coolant reser-
voir cap. Never attempt to
remove the radiator cap when
the engine is hot.
[EWA15161]
Recommended transmission oil: See page 8-1
Oil change quantity: 0.75 L (0.79 US qt, 0.66 Imp.qt)
Tightening torque:Transmission oil drain bolt: 17.5 Nm (1.7 m•kgf, 12.7 ft•lbf)
Oil check bolt: 6 Nm (0.6 m•kgf, 4.3 ft•lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
6
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EAU23095
Checking and lubricating the
cables
The operation of all control cables
and the condition of the cables
should be checked before each ride,
and the cables and cable ends should
be lubricated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or repla-
ce it. WARNING! Damage to the
outer housing of cables may result
in internal rusting and cause inter-
ference with cable movement.
Replace damaged cables as soon
as possible to prevent unsafe con-
ditions.
[EWA10711]EAU23114
Checking and lubricating the
throttle grip and cable
The operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated by a Yamaha dealer at the inter-
vals specified in the periodic mainte-
nance chart.
The throttle cable is equipped with a
rubber cover. Make sure that the
cover is securely installed. Even
though the cover is installed correctly,
it does not completely protect the
cable from water entry. Therefore, use
care not to pour water directly onto
the cover or cable when washing the
vehicle. If the cable or cover becomes
dirty, wipe clean with a moist cloth.
EAU23120
Adjusting the Autolube pump
The Autolube pump is a vital and sop-
histicated component of the engine,
which must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil
PERIODIC MAINTENANCE AND ADJUSTMENT
6-28
6
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Dimensions:Overall length:2202 mm (86.7 in)
Overall width: 689 mm (27.1 in)
Overall height: 1175 mm (46.3 in)
Seat height: 820 mm (32.3 in)
Wheelbase: 1341 mm (52.8 in)
Ground clearance: 151 mm (5.94 in)
Minimum turning radius: 2900 mm (114.2 in)
Weight:Curb weight:124 kg (273 lb)
Engine:Engine type:Liquid cooled 2-stroke
Cylinder arrangement: Single cylinder
Displacement: 49 cm
3
Bore x stroke:40.3 x 39.0 mm (1.59 x 1.54 in)
Compression ratio: 11.50 : 1
Starting system: Electric starter
Lubrication system: Wet sump
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)
Transmission oil:Transmission oil change quantity:0.75 L (0.79 US qt, 0.66 Im.qt)
Type: SAE10W-30 type SE motor oil
Cooling system:Coolant reservoir capacity (up to the maxi-
mum level mark):0.29 L (0.31 US qt, 0.26 Imp.qt)
Radiator capacity (including all routes): 0.70 L (0.74 US qt, 0.62 Imp.qt)
Air filter:Air filter element:Wet element
Fuel:Recommended fuel:Premium unleaded gasoline only
Fuel tank capacity: 13.8 L (3.65 US gal, 3.04 Imp.gal)
Fuel reserve amount: 2.2 L (0.58 US gal, 0.48 Imp.gal)
Carburetor:Manufacturer:DELL’ORTO
Type x quantity: PHBN 16 / DELL’ORTO x1
Spark plug(s):Manufacturer/model:NGK / BR9 ES
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
Clutch type: Wet, multiple-disc
Transmission:Primary reduction ratio:71/20 (3.55)
Secondary reduction ratio: 60/11 (5.45)
Final drive: Chain
Transmission type: Constant mesh 6-speed
Operation: Left foot operation
Gear ratio:1st:36/12 (3.00)
2nd: 33/16 (2.062)
3rd: 29/19 (1.526)
4th: 32/24 (1.227)
5th: 25/24 (1.041)
6th: 24/25 (0.960)
Chassis:Frame type:Double cradle
SPECIFICATIONS
8-1
8
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Caster angle:25.00 º
Trail: 90 mm (3.5 in)
Front tire:Type:Tubeless
Size: 100/80 17 (52H)
Manufacturer/model: Pirelli / Sport Demon
Manufacturer/model: Continental/Conti-Twist SM
Rear tire:Type:Tubeless
Size: 130/70 17 (62H)
Manufacturer/model: Pirelli / Sport Demon
Manufacturer/model: Continental/Conti-Twist SM
Maximum load: 196 kg (432 lb)
Tire air pressure (measured on cold
tires):
Loading condition:0–90 kg (0–198 lb)
Front: 180 kPa (1.80 kgf/cm
2, 26 psi, 1.80 bar)
Rear: 200 kPa (2.00 kgf/cm
2, 29 psi, 2.00 bar)
Loading condition: 90–193 kg (198–425 lb) Front:
190 kPa (1.90 kgf/cm
2, 28 psi, 1.90 bar)
Rear: 230 kPa (2.30 kgf/cm
2, 33 psi, 2.30 bar)High-speed riding:Front:190 kPa (1.90 kgf/cm2, 28 psi, 1.90 bar)
Rear: 230 kPa (2.30 kgf/cm
2, 33 psi, 2.30 bar)
Front wheel:Wheel type:Cast wheel
Rim size: 17M/C x MT2.50
Rear wheel:Wheel type:Cast wheel
Rim size: 17M/C x MT3.50
Front brake:Type:Single disc brake
Operation: Right hand operation
Recommended fluid: DOT 4
Rear brake:Type:Single disc brake
Operation: Right foot operation
Recommended fluid: DOT 4
Front suspension:Type:Telescopic fork
Spring/shock absorber type: Coil spring/oil damper
Wheel travel: 108.0 mm (4.25 in)
Rear suspension:Type:Swingarm (link suspension)
Spring/shock absorber type: Coil spring/oil damper
Wheel travel: 89.2 mm (3.51 in)
Electrical system:Ignition system:DC CDI
Charging system: Flywheel magneto
Battery:Model:GT4L-BS
Voltage, capacity: 12 V, 3.0 Ah
Headlight:Bulb type:Incandescence
Bulb voltage, wattage x quantity:Headlight:12 V, 25 W/25 W x 2
Headlight: 12 V, 25 W x 2
Tail/brake light: 12 V, 5.0 W/21.0 W x 1
SPECIFICATIONS
8-2
8
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