Page 17 of 66

 
3-1 
2
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6
7
8
9
 
INSTRUMENT AND CONTROL FUNCTIONS 
EAU40660 
Handlebar switch  
EAU40674 
Engine stop switch “OFF/RUN/
START”  
Set this switch to “START” before start-
ing the engine. Set this switch to “RUN”
after warming up the engine or before
starting off. Set this switch to “OFF” to
stop the engine.
TIP
 
 
The engine cannot be started with
this switch set to the “RUN” posi-
tion. 
 
The engine speed is limited while
this switch is set to the “START”
position, therefore the motorcyclecannot be ridden in that switch po- 
sition. 
EAU41041 
Speed limiter and power 
reduction plate  
Your motorcycle was delivered with an
adjustable speed limiter and a power
reduction plate. The speed limiter
keeps the throttle from fully opening,
even when the throttle grip is turned to
the maximum. The power reduction
plate is installed in the exhaust mani-
fold to limit the amount of power avail-
able while they learn.  
Speed limiter  
1. Loosen the locknut.
2. To increase the maximum engine
power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (a). To
decrease the maximum engine
power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (b). 
1.  Engine stop switch “OFF/RUN/START”
1 
     
        
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INSTRUMENT AND CONTROL FUNCTIONS 
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3. Tighten the locknut.
TIP
 
The adjusting range of the speed limiter
screw is from the fully turned-in position
to 7 mm (0.28 in) turned out. When thescrew is turned out to 7 mm (0.28 in),
the throttle grip can only be opened ap-
proximately halfway. If more power is
required, please consult a Yamaha 
dealer.
WARNING
 
EWA14630 
Improper adjustment of the speed
limiter could cause improper throttle
operation. You could lose control,
have an accident or be injured. Do
not turn the adjusting screw out
more than 7 mm (0.28 in) before con-
sulting a Yamaha dealer. Always
make sure the throttle cable free
play is adjusted to 1.5–3.5 mm 
(0.06–0.14 in). (See page 6-11.)
Power reduction plate 
Once the rider can operate with skill at
the top speed permitted by adjusting
the speed limiter alone, the power re-
duction plate can be removed. (See
page 6-6.) 
EAU12890 
Brake lever  
The brake lever is located at the right
handlebar grip. To apply the front
brake, pull the lever toward the handle-
bar grip. 
1. Locknut
2. Adjusting screw
1.  No more than 7 mm (0.28 in)
1
(a)(b)2
1
 
1.  Front brake lever
1 
     
        
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INSTRUMENT AND CONTROL FUNCTIONS 
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EAU12950 
Rear brake lever  
The rear brake lever is located on the
left handlebar grip. To apply the rear
brake, pull this lever toward the handle-
bar grip. 
EAU13182 
Fuel tank cap  
To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it clock-
wise.
WARNING
 
EWA11091 
Make sure that the fuel tank cap is
properly closed after filling fuel. 
Leaking fuel is a fire hazard. 
EAU13221 
Fuel  
Make sure there is sufficient gasoline in
the tank.
WARNING
 
EWA10881 
Gasoline and gasoline vapors are
extremely flammable. To avoid fires
and explosions and to reduce the
risk of injury when refueling, follow 
these instructions.  
1. Before refueling, turn off the en-
gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters and
clothes dryers.
2. Do not overfill the fuel tank. When
refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank. 
1.  Rear brake lever
1
 
1.  Fuel tank cap
1 
     
        
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INSTRUMENT AND CONTROL FUNCTIONS 
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9 such as the piston rings as well as to
 
the exhaust system. 
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
91 or higher. If knocking (or pinging) oc-
curs, use a gasoline of a different brand
or premium unleaded fuel. Use of un-
leaded fuel will extend spark plug life
and reduce maintenance costs. 
EAU13412 
Fuel tank breather hose  
Before operating the motorcycle: 
 
Check the fuel tank breather hose
connection. 
 
Check the fuel tank breather hose
for cracks or damage, and replace
it if damaged. 
 
Make sure that the fuel tank
breather hose is not blocked, and
clean it if necessary. 
EAU13452 
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.
TIP
 
Make sure that the 2-stroke engine oil 
tank cap is properly installed. 
1.  Fuel tank breather hose
1
 
1.  2-stroke engine oil tank cap
2.  Minimum level mark 
Recommended oil:  
See page 8-1.  
Oil quantity:  
0.30 L (0.32 US qt, 0.26 Imp.qt)
21